98 results on '"Piffaretti, Jc"'
Search Results
2. High prevalence of the metabolic syndrome in HIV-infected patients: impact of different definitions of the metabolic syndrome
- Author
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de Wolf, F, Zaheri, S, Gras, L, Bronsveld, W, Hillebrand Haverkort, Me, Prins, Jm, Bos, Jc, Eeftinck Schattenkerk, Jk, Geerlings, Se, Godfried, Mh, Lange, Jm, van Leth, Fc, Lowe, Sh, van der Meer, Jt, Nellen, Fj, Pogány, K, van der Poll, T, Reiss, P, Ruys, Ta, Steingrover, R, van Twillert, G, van der Valk, M, van Vonderen, Mg, Vrouenraets, Sm, van Vugt, M, Wit, Fw, van Eeden, A, ten Veen, Jh, van Dam, Ps, Roos, Jc, Brinkman, K, Frissen, Ph, Weigel, Hm, Mulder, Jw, van Gorp, Ec, Meenhorst, Pl, Mairuhu, At, Veenstra, J, Danner, Sa, Van Agtmael, Ma, Claessen, Fa, Perenboom, Rm, Rijkeboer, A, van Vonderen, M, Richter, C, van der Berg, J, van Leusen, R, Vriesendorp, R, Jeurissen, Fj, Kauffmann, Rh, Koger, El, Bravenboer, B, ten Napel, Ch, Kootstra, Gj, Sprenger, Hg, Miesen, Wm, Doedens, R, Scholvinck, Eh, ten Kate, Rw, van Houte, Dp, Polee, M, Kroon, Fp, van Dissel, Jt, Schippers, Ef, Schreij, G, van de Geest, S, Verbon, A, Koopmans, Pp, Keuter, M, Post, F, van der Ven, Aj, van der Ende, Me, Gyssens, Ic, van der Feltz, M, den Hollander, Jg, de Marie, S, Nouwen, Jl, Rijnders, Bj, de Vries, Te, Juttmann, Jr, van de Heul, C, van Kasteren, Me, Elisabeth, S, Schneider, Mm, Bonten, Mj, Borleffs, Jc, Ellerbroek, Pm, Hoepelman, Im, Jaspers, Ca, Schouten, I, Schurink, Ca, Blok, Wl, Tanis, Aa, Groeneveld, Ph, Salamon, R, Beylot, J, Dupon, M, Le Bras, M, Pellegrin, Jl, Ragnaud, Jm, Dabis, F, Chêne, G, Jacqmin Gadda, H, Thiébaut, R, Lawson Ayayi, S, Lavignolle, V, Balestre, E, Blaizeau, Mj, Decoin, M, Formaggio, Am, Delveaux, S, Labarerre, S, Uwamaliya, B, Vimard, E, Merchadou, L, Palmer, G, Touchard, D, Dutoit, D, Pereira, F, Boulant, B, Morlat, P, Bernard, N, Bonarek, M, Bonnet, F, Coadou, B, Gelie, P, Jaubert, D, Nouts, C, Lacoste, D, Dutronc, H, Cipriano, G, Lafarie, S, Chossat, I, Lacut, Jy, Leng, B, Mercie, P, Viallard, Jf, Faure, I, Rispal, P, Cipriano, C, Tchamgoué, S, Djossou, F, Malvy, D, Pivetaud, Jp, Chambon, D, De La Taille, C, Galperine, T, Neau, D, Ochoa, A, Beylot, C, Doutre, Ms, Bezian, Jh, Moreau, Jf, Taupin, Jl, Conri, C, Constans, J, Couzigou, P, Castera, L, Fleury, H, Lafon, Me, Masquelier, B, Pellegrin, I, Trimoulet, P, Moreau, F, Mestre, C, Series, C, Taytard, A, Law, M, Petoumenos, K, Anderson, J, Cortossis, P, Hoy, J, Watson, K, Roth, N, Nicholson, J, Bloch, M, Franic, T, Baker, D, Mcfarlane, R, Carr, A, Cooper, D, Chuah, J, Fankhauser, W, Mallal, S, Forsdyke, C, Calvo, G, Torres, F, Mateu, S, Domingo, P, Sambeat, Ma, Gatell, J, Del Cacho, E, Cadafalch, J, Fuster, M, Codina, C, Sirera, G, Vaqué, A, Clumeck, N, De Wit, S, Gerard, M, Kabeya, K, Konopnicki, D, Libois, A, Payen, Mc, Poll, B, Van Laethem, Y, Neaton, J, Bartsch, G, El Sadr, Wm, Krum, E, Thompson, G, Wentworth, D, Luskin Hawk, R, Telzak, E, Abrams, Di, Cohn, D, Markowitz, N, Arduino, R, Mushatt, D, Friedland, G, Perez, G, Tedaldi, E, Fisher, E, Gordin, F, Crane, Lr, Sampson, J, Baxter, J, Kirk, O, Mocroft, A, Ellefson, M, Phillips, An, Lundgren, Jd, Losso, M, Elias, C, Vetter, N, Zangerle, R, Karpov, I, Vassilenko, A, Mitsura, Vm, Suetnov, O, Colebunders, R, Vandekerckhove, L, Hadziosmanovic, V, Kostov, K, Begovac, I, Machala, L, Rozsypal, H, Sedlacek, D, Nielsen, J, Kronborg, G, Benfield, T, Larsen, M, Gerstoft, J, Katzenstein, T, Hansen, Ab, Skinhøj, P, Pedersen, C, Oestergaard, L, Zilmer, K, Ristola, M, Katlama, C, Viard, Jp, Girard, Pm, Livrozet, Jm, Vanhems, P, Pradier, C, Rockstroh, J, Schmidt, R, van Lunzen, J, Degen, O, Stellbrink, Hj, Staszewski, S, Bogner, J, Fätkenheuer, G, Gargalianos, P, Xylomenos, G, Perdios, J, Panos, G, Filandras, A, Karabatsaki, E, Sambatakou, H, Banhegyi, D, Mulcahy, F, Yust, I, Turner, D, Burke, M, Pollack, S, Hassoun, G, Maayan, S, Chiesi, A, Esposito, R, Mazeu, I, Mussini, C, Arici, C, Pristera, R, Mazzotta, F, Gabbuti, A, Vullo, V, Lichtner, M, Chirianni, A, Montesarchio, E, Gargiulo, M, Antonucci, G, Iacomi, F, Narciso, P, Vlassi, C, Zaccarelli, M, Lazzarin, A, Finazzi, R, Galli, M, Ridolfo, A, d'Arminio Monforte, A, Rozentale, B, Aldins, P, Chaplinskas, S, Hemmer, R, Staub, T, Bruun, J, Maeland, A, Ormaasen, V, Knysz, B, Gasiorowski, J, Horban, A, Bakowska, E, Prokopowicz, D, Flisiak, R, Boron Kaczmarska, A, Pynka, M, Beniowski, M, Mularska, E, Trocha, H, Jablonowska, E, Malolepsza, E, Wojcik, K, Antunes, F, Valadas, E, Maltez, F, Duiculescu, D, Rakhmanova, A, Vinogradova, E, Buzunova, S, Jevtovic, D, Mokrás, M, Staneková, D, Tomazic, J, González Lahoz, J, Soriano, V, Martin Carbonero, L, Labarga, P, Clotet, B, Jou, A, Paredes, R, Tural, C, Puig, J, Bravo, I, Gatell, Jm, Miró, Jm, Gutierrez, M, Mateo, G, Karlsson, A, Persson, Po, Flamholc, L, Ledergerber, B, Weber, R, Cavassini, M, Hirschel, B, Boffi, E, Furrer, H, Battegay, M, Elzi, L, Kravchenko, E, Chentsova, N, Kutsyna, G, Servitskiy, S, Antoniak, S, Krasnov, M, Barton, S, Johnson, Am, Mercey, D, Phillips, A, Johnson, Ma, Murphy, M, Weber, J, Scullard, G, Fisher, M, Leen, C, Morfeldt, L, Thulin, G, Sundström, A, Akerlund, B, Koppel, K, Håkangård, C, Moroni, M, Carosi, Giampiero, Cauda, R, Chiodo, F, Di Perri, G, Iardino, R, Ippolito, G, Panebianco, R, Pastore, G, Perno, Cf, Ammassari, A, Antinori, A, Balotta, C, Bonfanti, P, Capobianchi, Mr, Castagna, A, Ceccherini Silberstein, F, Cozzi Lepri, A, De Luca, A, Gervasoni, C, Girardi, E, Maggiolo, F, Murri, R, Puoti, M, Torti, C, Fanti, I, Formenti, T, Prosperi, M, Montroni, M, Giacometti, A, Costantini, A, Riva, A, Tirelli, U, Martellotta, F, Ladisa, N, Suter, F, Verucchi, G, Fiorini, C, Carosi, G, Cristini, G, Minardi, C, Bertelli, D, Quirino, T, Abeli, C, Manconi, Pe, Piano, P, Vecchiet, J, Farenga, M, Carnevale, G, Lorenzotti, S, Ghinelli, F, Sighinolfi, L, Leoncini, F, Pozzi, M, Pagano, G, Cassola, G, Viscoli, G, Alessandrini, A, Piscopo, R, Soscia, F, Tacconi, L, Orani, A, Rossotto, R, Tommasi, D, Congedo, P, Chiodera, A, Castelli, P, Rizzardini, G, Schlacht, I, Ridolfo, Al, Foschi, A, Salpietro, S, Merli, S, Melzi, S, Moioli, Mc, Cicconi, P, Gori, A, Abrescia, N, Izzo, Cm, De Marco, M, Viglietti, R, Manzillo, E, Ferrari, C, Pizzaferri, P, Baldelli, F, Camanni, G, Magnani, G, Ursitti, Ma, Arlotti, M, Ortolani, P, Andreoni, M, Tozzi, V, Acinapura, R, De Longis, P, Trotta, Mp, Carletti, F, Mura, Ms, Madeddu, G, Caramello, P, Orofino, Gc, Raise, E, Ebo, F, Pellizzer, G, Buonfrate, D, Fontas, E, Caissotti, C, Dellamonica, P, Bentz, L, Bernard, E, Cua, E, De Salvador Guillouet, F, Durant, J, Farhad, R, Ferrando, S, Mondain Miton, V, Perbost, I, Prouvost Keller, B, Pugliese, P, Rahelinirina, V, Roger, Pm, Vassallo, M, Baëz, E, Bernasconi, E, Böni, J, Bucher, H, Bürgisser, P, Cattacin, S, Dubs, R, Egger, M, Erb, P, Fischer, M, Flepp, M, Fontana, A, Francioli, P, Furrer, Hj, Gorgievski, M, Günthard, H, Kaiser, L, Kind, C, Klimkait, T, Lauper, U, Opravil, M, Paccaud, F, Pantaleo, G, Perrin, L, Piffaretti, Jc, Rickenbach, M, Rudin, C, Schmid, P, Schüpbach, J, Speck, R, Telenti, A, Trkola, A, Vernazza, P, and Yerly, S.
- Subjects
HIV ,metabolic syndrome - Published
- 2010
3. HIV-induced immunodeficiency and mortality from AIDS-defining and non-AIDS-defining malignancies
- Author
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Monforte, A, Abrams, D, Pradier, C, Weber, R, Reiss, P, Bonnet, F, Kirk, O, Law, M, De Wit, S, Friis Møller, N, Phillips, An, Sabin, Ca, Lundgren, Jd, Collaborators: Collins S, Data Collection on Adverse Events of Anti HIV Drugs Study G. r. o. u. p., Loeliger, E, Tressler, R, Weller, I, Worm, Sw, Sjøl, A, Sawitz, A, Rickenbach, M, Pezzotti, P, Krum, E, Gras, L, Balestre, E, Sundström, A, Poll, B, Fontas, E, Torres, F, Petoumenos, K, Kjaer, J, de Wolf, F, Zaheri, S, Bronsveld, W, Hillebrand Haverkort ME, Prins, Jm, Bos, Jc, Schattenkerk, Jk, Geerlings, Se, Godfried, Mh, Lange, Jm, van Leth FC, Lowe, Sh, van der Meer JT, Nellen, Fj, Pogány, K, van der Poll, T, Ruys, Ta, Sankatsing, Sr, van Twillert, G, van der Valk, M, van Vonderen MG, Vrouenraets, Sm, van Vugt, M, Wit, Fw, van Eeden, A, ten Veen JH, van Dam PS, Roos, Jc, Brinkman, K, Frissen, Ph, Weigel, Hm, Mulder, Jw, van Gorp EC, Meenhorst, Pl, Mairuhu, At, Veenstra, J, Danner, Sa, Van Agtmael MA, Claessen, Fa, Perenboom, Rm, Rijkeboer, A, van Vonderen, M, Richter, C, van der Berg, J, van Leusen, R, Vriesendorp, R, Jeurissen, Fj, Kauffmann, Rh, Koger, El, Bravenboer, B, ten Napel CH, Kootstra, Gj, Sprenger, Hg, Miesen, Wm, Doedens, R, Scholvinck, Eh, ten Kate RW, van Houte DP, Polee, M, Kroon, Fp, van den Broek, van Dissel JT, Schippers, Ef, Schreij, G, van de Geest, S, Verbon, A, Koopmans, Pp, Keuter, M, Post, F, van der Ven AJ, van der Ende ME, Gyssens, Ic, van der Feltz, M, den Hollander JG, de Marie, S, Nouwen, Jl, Rijnders, Bj, de Vries TE, Juttmann, Jr, van de Heul, C, van Kasteren ME, St Elisabeth SM, Bonten, Mj, Borleffs, Jc, Ellerbroek, Pm, Hoepelman, Im, Jaspers, Ca, Schouten, I, Schurink, Ca, Blok, Wl, Tanis, Aa, Groeneveld, Ph, Salamon, R, Beylot, J, Dupon, M, Le Bras, M, Pellegrin, Jl, Ragnaud, Jm, Dabis, F, Chêne, G, Jacqmin Gadda, H, Thiébaut, R, Lawson Ayayi, S, Lavignolle, V, Blaizeau, Mj, Decoin, M, Formaggio, Am, Delveaux, S, Labarerre, S, Uwamaliya, B, Vimard, E, Merchadou, L, Palmer, G, Touchard, D, Dutoit, D, Pereira, F, Boulant, B, Morlat, P, Bernard, N, Bonarek, M, Coadou, B, Gelie, P, Jaubert, D, Nouts, C, Lacoste, D, Dutronc, H, Cipriano, G, Lafarie, S, Chossat, I, Lacut, Jy, Leng, B, Mercié, P, Viallard, Jf, Faure, I, Rispal, P, Cipriano, C, Tchamgoué, S, Djossou, F, Malvy, D, Pivetaud, Jp, Chambon, D, De La Taille, C, Galperine, T, Neau, D, Ochoa, A, Beylot, C, Doutre, Ms, Bezian, Jh, Moreau, Jf, Taupin, Jl, Conri, C, Constans, J, Couzigou, P, Castera, L, Fleury, H, Lafon, Me, Masquelier, B, Pellegrin, I, Trimoulet, P, Moreau, F, Mestre, C, Series, C, Taytard, A, Glenday, K, Anderson, J, Cortissos, P, Mijch, A, Watson, K, Roth, N, Nicolson, J, Bloch, M, Agrawal, S, Franic, T, Baker, D, Vale, R, Carr, A, Cooper, D, Lacey, M, Hesse, K, Chuah, J, Lester, D, Fankhauser, W, Mallal, S, Forsdyke, C, Bulgannawar, S, Calvo, G, Mateu, S, Domingo, P, Sambeat, Ma, Gatell, J, Del Cacho, E, Cadafalch, J, Fuster, M, Codina, C, Sirera, G, Vaqué, A, Clumeck, N, Gerard, M, Kabeya, K, Konopnicki, D, Libois, A, Payen, Mc, Van Laethem, Y, Neaton, J, Bartsch, G, El Sadr WM, Thompson, G, Wentworth, D, Luskin Hawk, R, Telzak, E, Abrams, Di, Cohn, D, Markowitz, N, Arduino, R, Mushatt, D, Friedland, G, Perez, G, Tedaldi, E, Fisher, E, Gordin, F, Crane, Rl, Sampson, J, Baxter, J, Olsen, Ch, Mocroft, A, Vetter, N, Karpov, I, Vassilenko, A, Colebunders, R, Machala, L, Rozsypal, H, Sedlacek, D, Nielsen, J, Benfield, T, Gerstoft, J, Katzenstein, T, Hansen, Ab, Skinhøj, P, Pedersen, C, Zilmer, K, Katlama, C, Viard, Jp, Girard, Pm, Saint Marc, T, Vanhems, P, Dietrich, M, Manegold, C, van Lunzen, J, Stellbrink, Hj, Staszewski, S, Bieckel, M, Goebel, Fd, Fätkenheuer, C, Rockstroh, J, Schmidt, Re, Kosmidis, J, Gargalianos, P, Sambatakou, H, Perdios, J, Panos, G, Filandras, A, Banhegyi, D, Mulcahy, F, Yust, I, Burke, M, Turner, D, Pollack, S, Hassoun, J, Sthoeger, Z, Maayan, S, Vella, S, Chiesi, A, Arici, C, Pristerá, R, Mazzotta, F, Gabbuti, A, Esposito, R, Bedini, A, Chirianni, A, Montesarchio, E, Vullo, V, Santopadre, P, Narciso, P, Antinori, A, Franci, P, Zaccarelli, M, Lazzarin, A, Castagna, A, Viksna, L, Chaplinskas, S, Hemmer, R, Staub, T, Bruun, J, Maeland, A, Ormaasen, V, Knysz, B, Gasiorowski, J, Horban, A, Prokopowicz, D, Wiercinska Drapalo, A, Boron Kaczmarska, A, Pynka, M, Beniowski, M, Mularska, E, Trocha, H, Antunes, F, Mansinho, K, Maltez, F, Duiculescu, D, Babes, V, Streinu Cercel, A, Vinogradova, E, Rakhmanova, A, Jevtovic, D, Mokrás, M, Staneková, D, González Lahoz, J, Sanchez Conde, M, García Benayas, T, Martin Carbonero, L, Soriano, V, Clotet, B, Jou, A, Conejero, J, Ruiz, L, Tural, C, Gatell, Jm, Miró, Jm, Zamora, L, Blaxhult, A, Karlsson, A, Pehrson, P, Ledergerber, B, Francioli, P, Telenti, A, Hirschel, B, Soravia Dunand, V, Furrer, H, Kravchenko, E, Chentsova, N, Fisher, M, Brettle, R, Barton, S, Johnson, Am, Mercey, D, Murphy, M, Johnson, Ma, Weber, J, Scullard, G, Morfeldt, L, Thulin, G, Akerlund, B, Koppel, K, Flamholc, L, Håkangård, C, Ammassari, A, Maggiolo, F, Balotta, C, Bonfanti, P, Capobianchi, M, Ceccherini Silberstein, F, Cozzi Lepri, A, De Luca, A, Gervasoni, C, Girardi, E, Lo Caputo, S, Murri, R, Mussini, C, Puoti, M, Torti, Carlo, Moroni, M, Carosi, Giampiero, Cauda, R, Chiodo, F, Di Perri, G, Galli, M, Iardino, R, Ippolito, G, Panebianco, R, Pastore, G, Perno, Cf, Montroni, M, Scalise, G, Costantini, A, Riva, A, Tirelli, U, Martellotta, F, Ladisa, N, Suter, F, Colangeli, V, Fiorini, C, Carosi, G, Cristini, G, Torti, C, Minardi, C, Bertelli, D, Quirino, T, Manconi, Pe, Piano, P, Pizzigallo, E, D'Alessandro, M, Carnevale, G, Zoncada, A, Ghinelli, F, Sighinolfi, L, Leoncini, F, Pozzi, M, Grisorio, B, Ferrara, S, Pagano, G, Cassola, G, Alessandrini, A, Piscopo, R, Soscia, F, Tacconi, L, Orani, A, Perini, P, Tommasi, D, Congedo, P, Chiodera, F, Castelli, P, Rizzardini, G, Caggese, L, Galli, A, Merli, S, Pastecchia, C, Moioli, Mc, Gori, A, Cagni, S, Abrescia, N, Izzo, Cm, De Marco, M, Viglietti, R, Manzillo, E, Ferrari, C, Pizzaferri, P, Filice, G, Bruno, R, Magnani, G, Ursitti, Ma, Arlotti, M, Ortolani, P, Andreoni, M, Antonucci, G, Tozzi, V, Acinapura, R, De Longis, P, Trotta, Mp, Lichtner, M, Carletti, F, Mura, Mc, Mannazzu, M, Caramello, P, Orofino, Gc, Sciandra, M, Raise, E, Ebo, F, Pellizzer, G, Buonfrate, D, Caissotti, C, Dellamonica, P, Bentz, L, Bernard, E, De Salvador Guillouet, F, Durant, J, Mondain Miton, V, Perbost, I, Prouvost Keller, B, Pugliese, P, Rahelinirina, V, Roger, Pm, Vandenbos, F, Battegay, M, Bernasconi, E, Böni, J, Bucher, H, Bürgisser, P, Cattacin, S, Cavassini, M, Dubs, R, Egger, M, Elzi, L, Erb, P, Fischer, M, Flepp, M, Fontana, A, Furrer, Hj, Gorgievski, M, Günthard, H, Kaiser, L, Kind, C, Klimkait, T, Lauper, U, Opravil, M, Paccaud, F, Pantaleo, G, Perrin, L, Piffaretti, Jc, Schmid, Cr, Schüpbach, J, Speck, R, Trkola, A, Vernazza, P, and Yerly, S.
- Published
- 2008
4. Changes over time in risk factors for cardiovascular disease and use of lipid-lowering drugs in HIV-infected individuals and impact on myocardial infarction
- Author
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Data Collection on Adverse Events of Anti HIV Drugs Study Group, Sabin, Ca, d'Arminio Monforte, A, Friis Moller, N, Weber, R, El Sadr WM, Reiss, P, Kirk, O, Mercie, P, Law, Mg, De Wit, S, Pradier, C, Phillips, An, Collaborators: Lundgren JD, Lundgren J. D., Collins, S, Loeliger, E, Tressler, R, Weller, I, Friis Møller, N, Worm, Sw, Sjøl, A, Sawitz, A, Rickenbach, M, Pezzotti, P, Krum, E, Gras, L, Balestre, E, Sundström, A, Poll, B, Fontas, E, Torres, F, Petoumenos, K, Kjaer, J, de Wolf, F, Zaheri, S, Bronsveld, W, Hillebrand Haverkort ME, Prins, Jm, Bos, Jc, Eeftinck Schattenkerk JK, Geerlings, Se, Godfried, Mh, Lange, Jm, van Leth FC, Lowe, Sh, van der Meer JT, Nellen, Fj, Pogány, K, van der Poll, T, Ruys, Ta, Sankatsing, S, Steingrover, R, van Twillert, G, van der Valk, M, van Vonderen MG, Vrouenraets, Sm, van Vugt, M, Wit, Fw, van Eeden, A, ten Veen JH, van Dam PS, Roos, Jc, Brinkman, K, Frissen, Ph, Weigel, Hm, Mulder, Jw, van Gorp EC, Meenhorst, Pl, Mairuhu, At, Veenstra, J, Danner, Sa, Van Agtmael MA, Claessen, Fa, Perenboom, Rm, Rijkeboer, A, van Vonderen, M, Richter, C, van der Berg, J, van Leusen, R, Vriesendorp, R, Jeurissen, Fj, Kauffmann, Rh, Koger, El, Bravenboer, B, ten Napel CH, Kootstra, Gj, Sprenger, Hg, Miesen, Wm, Doedens, R, Scholvinck, Eh, ten Kate RW, van Houte DP, Polee, M, Kroon, Fp, van den Broek PJ, van Dissel JT, Schippers, Ej, Schreij, G, van de Geest PJ, Verbon, A, Koopmans, Pp, Keuter, M, Post, F, van der Ven AJ, van der Ende ME, Gyssens, Ic, van der Feltz, M, den Hollander JG, de Marie, S, Nouwen, Jl, Rijnders, Bj, de Vries TE, Juttmann, Jr, van de Heul, C, van Kasteren ME, Elisabeth, S, Schneider, Mm, Bonten, Mj, Borleffs, Jc, Ellerbroek, Pm, Hoepelman, Im, Jaspers, Ca, Schouten, I, Schurink, Ca, Blok, Wl, Tanis, Aa, Groeneveld, Ph, Salamon, R, Beylot, J, Dupon, M, Le Bras, M, Pellegrin, Jl, Ragnaud, Jm, Dabis, F, Chêne, G, Jacqmin Gadda, H, Thiébaut, R, Lawson Ayayi, S, Lavignolle, V, Blaizeau, Mj, Decoin, M, Formaggio, Am, Delveaux, S, Labarerre, S, Uwamaliya, B, Vimard, E, Merchadou, L, Palmer, G, Touchard, D, Dutoit, D, Pereira, F, Boulant, B, Morlat, P, Bernard, N, Bonarek, M, Bonnet, F, Coadou, B, Gelie, P, Jaubert, D, Nouts, C, Lacoste, D, Dutronc, H, Cipriano, G, Lafarie, S, Chossat, I, Lacut, Jy, Leng, B, Mercié, P, Viallard, Jf, Faure, I, Rispal, P, Cipriano, C, Tchamgoué, S, Djossou, F, Malvy, D, Pivetaud, Jp, Chambon, D, De La Taille, C, Galperine, T, Neau, D, Ochoa, A, Beylot, C, Doutre, Ms, Bezian, Jh, Moreau, Jf, Taupin, Jl, Conri, C, Constans, J, Couzigou, P, Castera, L, Fleury, H, Lafon, Me, Masquelier, B, Pellegrin, I, Trimoulet, P, Moreau, F, Mestre, C, Series, C, Taytard, A, Law, M, Anderson, J, Lowe, K, Mijch, A, Watson, K, Roth, N, Wood, H, Bloch, M, Gowers, A, Baker, D, Mcfarlane, R, Carr, A, Cooper, D, Chuah, J, Fankhauser, W, Mallal, S, Skett, J, Calvo, G, Mateu, S, Domingo, P, Sambeat, Ma, Gatell, J, Del Cacho, E, Cadafalch, J, Fuster, M, Codina, C, Sirera, G, Vaqué, A, Clumeck, N, Gerard, M, Kabeya, K, Konopnicki, D, Libois, A, Payen, Mc, Van Laethem, Y, Neaton, J, Thompson, G, Wentworth, D, Luskin Hawk, R, Telzak, E, Abrams, Di, Cohn, D, Markowitz, M, Crane, Lr, Arduino, R, Mushatt, D, Friedland, G, Perez, G, Tedaldi, E, Fisher, E, Gordin, F, Sampson, J, Baxter, J, Olsen, Ch, Mocroft, A, Lundgren, Jd, Vetter, N, Karpov, I, Vassilenko, A, Colebunders, R, Machala, L, Rozsypal, H, Sedlacek, D, Nielsen, J, Benfield, T, Gerstoft, J, Katzenstein, T, Hansen, Ab, Skinhøj, P, Pedersen, C, Zilmer, K, Katlama, C, Viard, Jp, Girard, Pm, Saint Marc, T, Vanhems, P, Dabis, C, Dietrich, M, Manegold, C, van Lunzen, J, Stellbrink, Hj, Staszewski, S, Bieckel, M, Goebel, Fd, Fätkenheuer, G, Rockstroh, J, Schmidt, Re, Kosmidis, J, Gargalianos, P, Sambatakou, H, Perdios, J, Panos, G, Filandras, A, Banhegyi, D, Mulcahy, F, Yust, I, Burke, M, Turner, D, Pollack, S, Hassoun, J, Sthoeger, Z, Maayan, S, Vella, S, Chiesi, A, Arici, C, Pristerá, R, Mazzotta, F, Gabbuti, A, Esposito, R, Bedini, A, Chirianni, A, Montesarchio, E, Vullo, V, Santopadre, P, Narciso, P, Antinori, A, Franci, P, Zaccarelli, M, Lazzarin, A, Castagna, A, D'Arminio Monforte, A, Viksna, L, Chaplinskas, S, Hemmer, R, Staub, T, Bruun, J, Maeland, A, Ormaasen, V, Knysz, B, Gasiorowski, J, Horban, A, Prokopowicz, D, Wiercinska Drapalo, A, Boron Kaczmarska, A, Pynka, M, Beniowski, M, Mularska, E, Trocha, H, Antunes, F, Mansinho, K, Maltez, F, Duiculescu, D, Babes, V, Streinu Cercel, A, Vinogradova, E, Rakhmanova, A, Jevtovic, D, Mokrás, M, Staneková, D, González Lahoz, J, Sanchez Conde, M, García Benayas, T, Martin Carbonero, L, Soriano, V, Clotet, B, Jou, A, Conejero, J, Ruiz, L, Tural, C, Gatell, Jm, Miró, Jm, Zamora, L, Blaxhult, A, Karlsson, A, Pehrson, P, Ledergerber, B, Francioli, P, Telenti, A, Hirschel, B, Soravia Dunand, V, Furrer, H, Kravchenko, E, Chentsova, N, Fisher, M, Brettle, R, Barton, S, Johnson, Am, Mercey, D, Murphy, M, Johnson, Ma, Weber, J, Scullard, G, Morfeldt, L, Thulin, G, Akerlund, B, Koppel, K, Flamholc, L, Håkangård, C, Moroni, M, Cargnel, A, Merli, S, Rizzardini, G, Pastecchia, C, Caggese, L, Moioli, C, Mura, Ms, Mannazzu, M, Suter, F, Manconi, Pe, Piano, P, Lo Caputo, S, Poggiom, A, Bottari, G, Pagano, G, Alessandrini, A, Scasso, A, Vincenti, A, Abbadessa, V, Mancuso, S, Alberici, F, Ruggieri, A, Arlotti, M, Ortolani, P, De Lalla, F, Tositti, G, Cassola, G, Piscopo, R, Raise, E, Ebo, F, Soscia, F, Tacconi, L, Tirelli, U, Di Gennaro, G, Santoro, D, Pusterla, L, Carosi, Giampiero, Torti, Carlo, Cadeo, G, Bertelli, D, Carnevale, G, Galloni, D, Filice, G, Bruno, R, Di Perri, G, Arnaudo, I, Caramello, P, Orofino, Gc, Soranzo, Ml, Bonasso, M, Quirino, T, Melzi, S, Chiodo, F, Colangeli, V, Magnani, G, Ursitti, M, Menichetti, F, Martinelli, C, Mussini, C, Ghinelli, F, Sighinolfi, L, Coronado, O, Ballardini, G, Rizzo, E, Montroni, M, Braschi, Mc, Petrelli, E, Cioppi, A, Cauda, R, De Luca, A, Petrosillo, N, Noto, P, Bontempo, G, Acinapura, A, Antonucci, G, De Longis, P, Lichtner, M, Pastore, G, Ladisa, N, Viglietti, R, Piazza, M, Nappa, S, Abrescia, N, De Marco, M, Colomba, A, Prestileo, T, De Stefano, C, La Gala, A, Cosco, L, Scerbo, A, Grima, P, Tundo, P, Vecchiet, J, D'Alessandro, M, Grisorio, B, Ferrara, S, Caissotti, C, Dellamonica, P, Bentz, L, Bernard, E, De Salvador Guillouet, F, Durant, J, Mondain Miton, V, Perbost, I, Prouvost Keller, B, Pugliese, P, Rahelinirina, V, Roger, Pm, Vandenbos, F, Battegay, M, Bernasconi, E, Böni, J, Bucher, H, Bürgisser, P, Cattacin, S, Cavassini, M, Dubs, R, Egger, M, Elzi, L, Erb, P, Fischer, M, Flepp, M, Fontana, A, Furrer, Hj, Gorgievski, M, Günthard, H, Kaiser, L, Kind, C, Klimkait, T, Lauper, U, Opravil, M, Paccaud, F, Pantaleo, G, Perrin, L, Piffaretti, Jc, Rudin, C, Schmid, P, Schüpbach, J, Speck, R, Trkola, A, Vernazza, P, and Yerly, S.
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- 2008
5. Use of nucleoside reverse transcriptase inhibitors and risk of myocardial infarction in HIV-infected patients enrolled in the D:A:D study: a multi-cohort collaboration
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D:A:D Study Group, Sabin, Ca, Worm, Sw, Weber, R, Reiss, P, El Sadr, W, Dabis, F, De Wit, S, Law, M, D'Arminio Monforte, A, Friis Møller, N, Kirk, O, Pradier, C, Weller, I, Phillips, An, Collaborators: Collins S, Lundgren J. D., El Sadr WM, Phillips, A, Rosseau, F, Storfer, Sp, Weber, I, Lundgren, Jd, Sjøl, A, Sawitz, A, Rickenbach, M, Pezzotti, P, Krum, E, Gras, L, Balestre, E, Sundström, A, Poll, B, Fontas, E, Torres, F, Petoumenos, K, Kjaer, J, Hammer, S, Neaton, J, de Wolf, F, Zaheri, S, Bronsveld, W, Hillebrand Haverkort ME, Prins, Jm, Bos, Jc, Eeftinck Schattenkerk JK, Geerlings, Se, Godfried, Mh, Lange, Jm, van Leth FC, Lowe, Sh, van der Meer JT, Nellen, Fj, Pogány, K, van der Poll, T, Ruys, Ta, Sankatsing, Steingrover, R, van Twillert, G, van der Valk, M, van Vonderen MG, Vrouenraets, Sm, van Vugt, M, Wit, Fw, van Eeden, A, ten Veen JH, van Dam PS, Roos, Jc, Brinkman, K, Frissen, Ph, Weigel, Hm, Mulder, Jw, van Gorp EC, Meenhorst, Pl, Mairuhu, At, Veenstra, J, Danner, Sa, Van Agtmael MA, Claessen, Fa, Perenboom, Rm, Rijkeboer, A, van Vonderen, M, Richter, C, van der Berg, J, van Leusen, R, Vriesendorp, R, Jeurissen, Fj, Kauffmann, Rh, Koger, El, Bravenboer, B, ten Napel CH, Kootstra, Gj, Sprenger, Hg, Miesen, Wm, Doedens, R, Scholvinck, Eh, ten Kate RW, van Houte DP, Polee, M, Kroon, Fp, van den Broek, van Dissel JT, Schippers, Ef, Schreij, G, van de Geest, S, Verbon, A, Koopmans, Pp, Keuter, M, Post, F, van der Ven AJ, van der Ende ME, Gyssens, Ic, van der Feltz, M, den Hollander JG, de Marie, S, Nouwen, Jl, Rijnders, Bj, de Vries TE, Juttmann, Jr, van de Heul, C, van Kasteren ME, Elisabeth, St, Schneider, Mm, Bonten, Mj, Borleffs, Jc, Ellerbroek, Pm, Hoepelman, Im, Jaspers, Ca, Schouten, I, Schurink, Ca, Blok, Wl, Tanis, Aa, Groeneveld, Ph, Salamon, R, Beylot, J, Dupon, M, Le Bras, M, Pellegrin, Jl, Ragnaud, Jm, Chêne, G, Jacqmin Gadda, H, Thiébaut, R, Lawson Ayayi, S, Lavignolle, V, Blaizeau, Mj, Decoin, M, Formaggio, Am, Delveaux, S, Labarerre, S, Uwamaliya, B, Vimard, E, Merchadou, L, Palmer, G, Touchard, D, Dutoit, D, Pereira, F, Boulant, B, Morlat, P, Bernard, N, Bonarek, M, Bonnet, F, Coadou, B, Gelie, P, Jaubert, D, Nouts, C, Lacoste, D, Dutronc, H, Cipriano, G, Lafarie, S, Chossat, I, Lacut, Jy, Leng, B, Mercié, P, Viallard, Jf, Faure, I, Rispal, P, Cipriano, C, Tchamgoué, S, Djossou, F, Malvy, D, Pivetaud, Jp, Chambon, D, De La Taille, C, Galperine, T, Neau, D, Ochoa, A, Beylot, C, Doutre, Ms, Bezian, Jh, Moreau, Jf, Taupin, Jl, Conri, C, Constans, J, Couzigou, P, Castera, L, Fleury, H, Lafon, Me, Masquelier, B, Pellegrin, I, Trimoulet, P, Moreau, F, Mestre, C, Series, C, Taytard, A, Anderson, J, Cortossis, P, Hoy, J, Watson, K, Roth, N, Bloch, M, Franic, T, Baker, D, Mcfarlane, R, Carr, A, Cooper, D, Chuah, J, Fankhauser, W, Mallal, S, Forsdyke, C, Calvo, G, Mateu, S, Domingo, P, Sambeat, Ma, Gatel, J, Del Cacho, E, Cadafalch, J, Fuster, M, Codina, C, Sirera, G, Vaqué, A, Clumeck, N, Gerard, M, Kabeya, K, Konopnicki, D, Libois, A, Payen, Mc, Van Laethem, Y, Bartsch, G, Thompson, G, Wentworth, D, Luskin Hawk, R, Telzak, E, Abrams, Di, Cohn, D, Markowitz, N, Arduino, R, Mushatt, D, Friedland, G, Perez, G, Tedaldi, E, Fisher, E, Gordin, F, Crane, Lr, Sampson, J, Baxter, J, Mocroft, A, Vetter, N, Karpov, I, Vassilenko, A, Colebunders, R, Machala, L, Rozsypal, H, Sedlacek, D, Nielsen, J, Benfield, T, Gerstoft, J, Katzenstein, T, Hansen, Ab, Skinhøj, P, Pedersen, C, Zilmer, K, Katlama, C, Viard, Jp, Girard, Pm, Saint Marc, T, Vanhems, P, Dietrich, M, Manegold, C, van Lunzen, J, Stellbrink, Hj, Staszewski, S, Bieckel, M, Goebel, Fd, Fätkenheuer, G, Rockstroh, J, Schmidt, Re, Kosmidis, J, Gargalianos, P, Sambatakou, H, Perdios, J, Panos, G, Filandras, A, Banhegyi, D, Mulcahy, F, Yust, I, Burke, M, Turner, D, Pollack, S, Hassoun, J, Sthoeger, Z, Maayan, S, Vella, S, Chiesi, A, Arici, C, Pristerá, R, Mazzotta, F, Gabbuti, A, Esposito, R, Bedini, A, Chirianni, A, Montesarchio, E, Vullo, V, Santopadre, P, Narciso, P, Antinori, A, Franci, P, Zaccarelli, M, Lazzarin, A, Castagna, A, Viksna, L, Chaplinskas, S, Hemmer, R, Staub, T, Bruun, J, Maeland, A, Ormaasen, V, Knysz, B, Gasiorowski, J, Horban, A, Prokopowicz, D, Wiercinska Drapalo, A, Boron Kaczmarsk, A, Pynka, M, Beniowski, M, Mularska, E, Trocha, H, Antunes, A, Mansinho, K, Maltez, F, Duiculescu, D, Streinu Cercel, A, Vinogradova, E, Rakhmanova, A, Jevtovic, D, Mokrás, M, Staneková, D, González Lahoz, J, Sanchez Conde, M, García Benayas, T, Martin Carbonero, L, Soriano, V, Clotet, B, Jou, A, Conejero, J, Ruiz, L, Tural, C, Gatell, Jm, Miró, Jm, Zamora, L, Gutierrez, M, Mateo, G, Blaxhult, A, Karlsson, A, Pehrson, P, Ledergerber, B, Francioli, P, Telenti, A, Hirschel, B, Soravia Dunand, V, Furrer, H, Kravchenko, E, Chentsova, N, Fisher, M, Brettle, R, Barton, S, Johnson, Am, Mercey, D, Murphy, M, Johnson, Ma, Weber, J, Scullard, G, Morfeld, L, Thulin, G, Akerlund, B, Koppel, K, Flamholc, L, Håkangård, C, d'Arminio Monforte, A, Moroni, M, Cargnel, A, Merli, S, Vigevani, Gm, Pastecchia, C, Morsica, G, Caggese, L, Moioli, C, Mura, Ms, Mannazzu, M, Suter, F, Manconi, Pe, Piano, P, Lo Caputo, S, Poggio, A, Bottari, G, Pagano, G, Alessandrini, A, Scasso, A, Abbadessa, V, Mancuso, S, Alberici, F, Ruggieri, A, Arlotti, M, Ortolani, P, De Lalla, F, Tositti, G, Cassola, G, Piscopo, R, Raise, E, Ebo, F, Soscia, F, Tacconi, L, Tirelli, U, Cinelli, R, Santoro, D, Pusterla, L, Carosi, Giampiero, Torti, Carlo, Cadeo, G, Bertelli, D, Carnevale, G, Citterio, P, Filice, G, Bruno, R, Di Perri, G, Arnaudo, I, Caramello, P, Orofino, Gc, Soranzo, Ml, Bonasso, M, Rizzardini, G, Melzi, S, Chiodo, F, Colangeli, V, Magnani, G, Ursitti, M, Menichetti, F, Martinelli, C, Mussini, C, Ghinelli, F, Sighinolfi, L, Coronado, O, Ballardini, G, Rizzo, E, Montroni, M, Braschi, Mc, Petrelli, E, Cioppi, A, Cauda, R, De Luca, A, Petrosillo, N, Noto, P, Bontempo, G, Acinapura, R, Antonucci, G, De Longis, P, Lichtner, M, Pastore, G, Ladisa, N, Viglietti, R, Piazza, M, Nappa, S, Abrescia, N, De Marco, M, Colomba, A, Prestileo, T, De Stefano, C, La Gala, A, Cosco, L, Scerbo, A, Grima, P, Tundo, P, Vecchiet, J, D'Alessandro, M, Grisorio, B, Ferrara, S, Caissotti, C, Dellamonica, P, Bentz, L, Bernard, E, De Salvador Guillouet, F, Durant, J, Mondain Miton, V, Perbost, I, Prouvost Keller, B, Pugliese, P, Rahelinirina, V, Roger, Pm, Vander, F, Battegay, M, Bernasconi, E, Böni, J, Buche, H, Bürgisser, P, Cattacin, S, Cavassini, M, Dubs, R, Egger, M, Elzi, L, Erb, P, Fischer, M, Flepp, M, Fontana, A, Furrer, Hj, Gorgievski, M, Günthard, H, Kaiser, L, Kind, C, Klimkait, T, Lauper, U, Opravil, M, Paccaud, F, Pantaleo, G, Perrin, L, Piffaretti, Jc, Rudin, C, Schmid, P, Schüpbach, J, Speck, R, Trkola, A, Vernazza, P, and Yerly, S.
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- 2008
6. Antibiotikaresistenzdaten der Schweiz: jetzt online
- Author
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Kronenberg, A, primary, Zanetti, G, additional, Piffaretti, JC, additional, and Mühlemann, K, additional
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- 2008
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7. Chloramphenicol Acetylation in Whole Cells of Escherichia coli Carrying R-Factors Characterization and Kinetic Studies
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Pitton Js and Piffaretti Jc
- Subjects
Pharmacology ,medicine.drug_class ,Chloramphenicol ,Antibiotics ,Wild type ,General Medicine ,Biology ,medicine.disease_cause ,Thin-layer chromatography ,Microbiology ,Chloramphenicol Resistance ,Infectious Diseases ,Oncology ,Biochemistry ,Acetylation ,Drug Discovery ,medicine ,Pharmacology (medical) ,Escherichia coli ,medicine.drug - Abstract
Chloramphenicol resistance has been shown to be transferable in 80 out of 95 wild type strains of E. coli. A new sensitive test (by thin layer chromatography) demonstrated that all
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- 1970
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8. Incidence of tuberculosis among HIV-infected patients receiving highly active antiretroviral therapy in Europe and North America
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Costagliola, D., Dabis, F., Monforte, Ad, Wolf, F., Egger, M., Fatkenheuer, G., Gill, J., Hogg, R., Justice, A., Ledergerber, B., Lundgren, J., May, M., Phillips, A., Reiss, P., Sabin, C., Staszewski, S., Sterne, J., Weller, I., Beckthold, B., Yip, B., Dauer, B., Fusco, J., Grabar, S., Lanoy, E., Junghans, C., Lavignolle, V., Leth, F., Pereira, E., Pezzotti, P., Schmeisser, N., Billaud, E., Boue, F., Duval, X., Duvivier, C., Enel, P., Fournier, S., Gasnault, J., Gaud, C., Gilquin, J., Khuong, Ma, Lang, Jm, Mary-Krause, M., Matheron, S., Meyohas, Mc, Pialoux, G., Poizot-Martin, I., Pradier, C., Rouveix, E., Salmon-Ceron, D., Sobel, A., Tattevin, P., Tissot-Dupont, H., Yasdanpanah, Y., Aronica, E., Tirard-Fleury, V., Tortay, I., Abgrall, S., Guiguet, M., Leneman, H., Lievre, L., Potard, V., Saidi, S., Vilde, Jl, Leport, C., Yeni, P., Bouvet, E., Gaudebout, C., Crickx, B., Picard-Dahan, C., Weiss, L., Tisne-Dessus, D., Sicard, D., Salmon, D., Auperin, I., Viard, Jp, Roudiere, L., Delfraissy, Jf, Goujard, C., Lesprit, P., Jung, C., Meynard, Jl, Picard, O., Desplanque, N., Cadranel, J., Mayaud, C., Rozenbaum, W., Bricaire, F., Katlama, C., Herson, S., Simon, A., Decazes, Jm, Molina, Jm, Clauvel, Jp, Gerard, L., Widal, Ghlf, Sellier, P., Diemer, M., Dupont, C., Berthe, H., Saiag, P., Mortier, L., Mortier, E., Chandemerle, C., Truchis, P., Bentata, M., Honore, P., Tassi, S., Jeantils, V., Mechali, D., Taverne, B., Laurichesse, H., Gourdon, F., Lucht, F., Fresard, A., Faller, Jp, Eglinger, P., Bazin, C., Verdon, R., Peyramond, D., Boibieux, A., Touraine, Jl, Livrozet, Jm, Trepo, C., Cotte, L., Ravaux, I., Delmont, Jp, Moreau, J., Gastaut, Ja, Soubeyrand, J., Retornaz, F., Blanc, Pa, Allegre, T., Galinier, A., Ruiz, Jm, Lepeu, G., Granet-Brunello, P., Pelissier, L., Esterni, Jp, Nezri, M., Cohen-Valensi, R., Laffeuillade, A., Chadapaud, S., Reynes, J., May, T., Rabaud, C., Raffi, F., Pugliese, P., Michelet, C., Arvieux, C., Caron, F., Borsa-Lebas, F., Fraisse, P., Massip, P., Cuzin, L., Arlet-Suau, E., Legrand, Mft, Sobesky, M., Pradinaud, R., Guyon, F., Contant, M., Montroni, M., Scalise, G., Braschi, Mc, Aviano, Ar, Tirelli, U., Cinelli, R., Pastore, G., Ladisa, N., Minafra, G., Suter, F., Arici, C., Chiodo, F., Colangeli, V., Fiorini, C., Coronado, O., Carosi, G., Cadeo, Gp, Torti, C., Minardi, C., Bertelli, D., Rizzardini, G., Melzi, S., Manconi, Pe, Catanzaro, Pp, Cosco, L., Scerbo, A., Vecchiet, J., D Alessandro, M., Santoro, D., Pusterla, L., Carnevale, G., Citterio, P., Vigano, P., Mena, M., Ghinelli, F., Sighinolfi, L., Leoncini, F., Mazzotta, F., Pozzi, M., Lo Caputo, S., Angarano, G., Grisorio, B., Saracino, A., Ferrara, S., Grima, P., Tundo, P., Pagano, G., Cassola, G., Alessandrini, A., Piscopo, R., Toti, M., Chigiotti, S., Soscia, F., Tacconi, L., Orani, A., Perini, P., Scasso, A., Vincenti, A., Chiodera, F., Castelli, P., Scalzini, A., Palvarini, L., Moroni, M., Lazzarin, A., Cargnel, A., Vigevani, Gm, Caggese, L., Repetto, D., Galli, A., Merli, S., Pastecchia, C., Moioli, Mc, Esposito, R., Mussini, C., Abrescia, N., Chirianni, A., Izzo, Cm, Piazza, M., Marco, M., Viglietti, R., Manzillo, E., Nappa, S., Colomba, A., Abbadessa, V., Prestileo, T., Mancuso, S., Ferrari, C., Pizzaferri, P., Filice, G., Minoli, L., Bruno, R., Novati, S., Baldelli, F., Tinca, M., Petrelli, E., Cioppi, A., Alberici, F., Ruggieri, A., Menichetti, F., Martinelli, C., Stefano, C., La Gala, A., Ballardini, G., Rizzo, E., Magnani, G., Ursitti, Ma, Arlotti, M., Ortolani, P., Cauda, R., Dianzani, F., Ippolito, G., Antinori, A., Antonucci, G., D Elia, S., Narciso, P., Petrosillo, N., Vullo, V., Luca, A., Bacarelli, A., Zaccarelli, M., Acinapura, R., Longis, P., Brandi, A., Trotta, Mp, Noto, P., Lichtner, M., Capobianchi, MR, Carletti, F., Girardi, E., Rezza, G., Mura, Ms, Mannazzu, M., Caramello, P., Di Perri, G., Soranzo, Ml, Orofino, Gc, Arnaudo, I., Bonasso, M., Grossi, Pa, Basilico, C., Poggio, A., Bottari, G., Raise, E., Ebo, F., 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9. Résistance au chloramphénicol de différentes souches de Escherichia coli. Acétylation de l’antibiotique
- Author
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Pitton Js and Piffaretti Jc
- Subjects
Chloramphenicol Resistance ,medicine.drug_class ,Chemistry ,Acetylation ,Antibiotics ,medicine ,Cell Biology ,General Medicine ,medicine.disease_cause ,Molecular Biology ,Escherichia coli ,Pathology and Forensic Medicine ,Microbiology - Published
- 1969
- Full Text
- View/download PDF
10. Effet du chloramphénicol et de ses dérives acétylés sur la synthèse des protéines
- Author
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Allet B and Piffaretti Jc
- Subjects
Cell Biology ,General Medicine ,Molecular Biology ,Pathology and Forensic Medicine - Published
- 1970
- Full Text
- View/download PDF
11. Predictors of trend in CD4-positive T-cell count and mortality among HIV-1 infected individuals with virological failure to all three antiretroviral-drug classes
- Author
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F., Da, Dabis, Db, F., Thiebaut, Db, R., Chêne, Db, G., Lawson, Ayayi, Db, S., Meyer, Dc, L., Boufassa, Dc, F., Hamouda, Dd, O., De, P., De, G., Touloumi, Df, G., Hatzakis, Df, A., Karafoulidou, Katsarou, Df, O., Brettle, Dg, R., Del, Amo, Dh, J., Del, Romero, Van, Asten, Di, L., Van, Benthem, Di, B., Di, M., Coutinho, Di, R., Kirk, Dj, O., Pedersen, Dj, C., Hernández, Aguado, Dk, I., Pérez, Hoyos, Dk, S., Eskild, Dl, A., Bruun, J. N., Dl, Sannes, Dl, M., Lee, Dm, C., Johnson, A. M., Dn, Babiker, Dn, A., Darbyshire, Dn, J., Gill, Dn, N., Porter, Dn, K., Do, P., Vanhems, Do, M., Cooper, Dp, D., Kaldor, Dpdq, J., Ashton, Dp, L., Dq, D., Dq, L., Vizzard, Dq, J., Muga, Dr, R., Ds, P., Dt, J., Cayla, Du, J., Garcia de Olalla, Du, P., Day, N. E., Dv, Angelis, De, Dv, D., Fb, K., Dw, A., Dw, S., Dw, J., Tyrer, Dw, F., Beral, Fb, V., Fb, N., Raffanti, Becker, Scarsella, Braun, Most, Balu, Gilbert, Fleenor, Ising, Dieterich, Fb, D., Fusco, Losso, Dx, M., Duran, Dx, A., Vetter, Dy, N., Clumeck, Dz, N., Wit, De, Dz, S., Kabeya, Dz, K., Poll, Dz, B., Colebunders, Dz, R., Machala, Ea, L., Rozsypal, Ea, H., Nielsen, Eb, J., Lundgren, Eb, O., Olsen, C. H., Eb, Gerstoft, Katzenstein, Eb, T., Hansen, A. B. E., Eb, Skinhøj, Eb, P., Eb, C., Zilmer, Ec, K., Rauka, Ec, M., Katlama, Ed, C., De, Sa, Ed, M., Viard, J. P., Ed, Saint, Marc, Ed, T., Ed, P., Pradier, Dietrich, Ee, M., Manegold, Ee, C., Van, Lunzen, Ee, J., Stellbrink, H. J., Ee, Miller, Ee, V., Goebel, F. D., Ee, Salzberger, Ee, B., Rockstroh, Kosmidis, Ef, J., Gargalianos, Ef, P., Sambatakou, Ef, H., Perdios, Panos, Ef, G., Filandras, Ef, A., Banhegyi, Eg, D., Mulcahy, Eh, F., Yust, Ei, I., Burke, Ei, M., Pollack, Ei, S., Hassoun, Ei, J., Sthoeger, Ei, Z., Maayan, Vella, Ej, S., Chiesi, Ej, A., Ej, C., Pristerá, Ej, R., Ej, F., Gabbuti, Bedini, Ej, E., Ej, V., Santopadre, Ej, P., Franci, Ej, M., Castagna, Viksna, Ek, L., Rozentale, Ek, B., Chaplinskas, El, S., Hemmer, Em, R., Staub, Em, T., En, J., Maeland, En, A., Ormaasen, En, V., Knysz, Eo, B., Gasiorowski, Eo, J., Horban, Eo, A., Prokopowicz, Eo, D., Wiercinska, Drapalo, Boron, Kaczmarska, Pynka, Eo, M., Beniowski, Trocha, Eo, H., Smiatacz, Eo, T., Antunes, Ep, F., Mansinho, Ep, K., Maltez, Duiculescu, Eq, D., Streinu, Cercel, Eq, A., Mokrás, Er, M., Staneková, Er, D., González, Lahoz, Es, J., Diaz, Es, B., García, Benayas, Es, T., Martin, Carbonero, Es, L., Soriano, Es, V., Clotet, Jou, Es, A., Conejero, Tural, Es, C., Gatell, J. M., Es, Miró, Zamora, Blaxhult, Et, A., Karlsson, Pehrson, Et, P., Eu, P., Eu, B., Schiffer, Eu, V., Eu, H., Chentsova, Ev, N., Barton, Ew, S., A. M., Ew, Mercey, Ew, D., Phillips, Ew, A., Youle, Ew, M., M. A., Ew, Mocroft, Murphy, Weber, Ew, J., Scullard, Ew, G., Fisher, Ew, R., Loveday, Ew, C., Ex, B., Ruiz, Ex, L., Helm, E. B., Fb, Carlebach, Mösch, Müller, Haberl, Korn, Stephan, Bickel, Gute, Locher, Lutz, Klauke, Doerr, H. W., Fb, Stürmer, Dauer, Jennings, Alexander, Braitstein, Chan, Cote, Gataric, Harrigan, P. R., Fb, Harris, Bonner, Montaner, O'Shaughnessy, Yip, Chaloner, Gumley, Ransom, Sabin, C. A., Fb, Lipman, Ey, J., Read, Ey, R., Ez, F., Riccio, Fa, G., Borghi, AII - Amsterdam institute for Infection and Immunity, APH - Amsterdam Public Health, Infectious diseases, Global Health, Other departments, Public and occupational health, General Internal Medicine, Center of Experimental and Molecular Medicine, Ledergerber, B, Lundgren, Jd, Walker, A, Sabin, C, Justice, A, Reiss, P, Mussini, C, Wit, F, Monforte, Ad, Weber, R, Fusco, G, Staszewski, S, Law, M, Hogg, R, Lampe, F, Gill, Mj, Castelli, F, Phillips, An, Fusco, Gp, Rooney, P, Taylor, S, Couldwell, D, Austin, D, Block, M, Clemons, J, Finlayson, R, Petoumenos, K, Quan, D, Smith, D, O'Connor, C, Gorton, C, Allen, D, Mulhall, B, Mutimer, K, Keeffe, N, Cooper, D, Carr, A, Miller, J, Pell, C, Ellis, D, Baker, D, Kidd, J, Mcfarlane, R, Liang, Mt, Brown, K, Huffam, S, Savage, J, Morgan, S, Knibbs, P, Sowden, D, Orth, D, Lister, G, Chuah, J, Fankhauser, W, Dickson, B, Bradford, D, Wilson, C, Ree, H, Magon, H, Anderson, J, Moore, R, Russell, D, Mcgovern, G, Mcnair, R, Bal, J, Fairley, K, Roth, N, Eu, B, Strecker, S, Wood, H, Mijch, A, Hoy, J, Pierce, A, Mccormack, C, Watson, K, Medland, N, Daye, J, Mallal, S, French, M, Skett, J, Maxwel, D, Cain, A, Montroni, M, Scalise, G, Costantini, A, Giacometti, A, Tirelli, U, Nasti, G, Pastore, G, Ladisa, N, Perulli, Ml, Suter, F, Arici, C, Chiodo, F, Gritti, Fm, Colangeli, V, Fiorini, C, Guerra, L, Carosi, G, Cadeo, Gp, Minardi, C, Vangi, D, Rizzardini, G, Migliorino, G, Manconi, Pe, Piano, P, Ferraro, T, Scerbo, A, Pizzigallo, E, Ricci, F, Santoro, D, Pusterla, L, Carnevale, G, Galloni, D, Vigano, P, Mena, M, Ghinelli, F, Sighinolfi, L, Leoncini, F, Mazzotta, F, Pozzi, M, Lo Caputo, S, Angarano, G, Grisorio, B, Ferrara, S, Grima, P, Tundo, P, Pagano, G, Piersantelli, N, Alessandrini, A, Piscopo, R, Toti, M, Chigiotti, S, Soscia, F, Taccooni, L, Orani, A, Perini, P, Scasso, A, Vincenti, A, Scalzini, A, Fibbia, G, Moroni, M, Lazzarin, A, Cargnel, A, Vigevani, Gm, Caggese, L, Tordato, F, Novati, R, Galli, A, Merli, S, Pastecchia, C, Moioli, C, Esposito, R, Abrescia, N, Chirianni, A, Izzo, C, Piazza, M, De Marco, M, Montesarchio, V, Manzillo, E, Nappa, S, Colomba, A, Abbadessa, V, Prestileo, T, Mancuso, S, Ferrari, C, Pzzaferri, P, Filice, G, Minoli, L, Bruno, R, Maserati, R, Pauluzzi, S, Baldelli, F, Petrelli, E, Cioppi, A, Alberici, F, Ruggieri, A, Menichetti, F, Martinelli, C, De Stefano, C, La Gala, A, Zauli, T, Ballardini, G, Magnani, G, Ursitti, Ma, Arlotti, M, Ortolani, P, Ortona, L, Dianzani, F, Ippolito, G, Antinori, A, Antonucci, G, D'Elia, S, Narciso, P, Petrosillo, N, Vullo, V, De Luca, A, Del Forno, L, Zaccarelli, M, De Longis, P, Ciardi, M, D'Offizi, G, Noto, P, Lichtner, M, Capobianchi, Mr, Girardi, E, Pezzotti, P, Rezza, G, Mura, M, Mannazzu, M, Caramello, P, Sinicco, A, Soranzo, Ml, Gennero, L, Sciandra, M, Salassa, B, Grossi, Pa, Basilico, C, Poggio, A, Bottari, G, Raise, E, Pasquinucci, S, De Lalla, F, Tositti, G, Resta, F, Chimienti, A, Lepri, Ac, Bachmann, S, Battegay, M, Bernasconi, E, Bucher, H, Burgisser, P, Cattacin, S, Egger, M, Erb, P, Fierz, W, Fischer, M, Flepp, M, Fontana, A, Francioli, P, Furrer, Hj, Gorgievski, M, Hirschel, B, Kaiser, L, Kind, C, Klimkait, T, Lauper, U, Opravil, M, Paccaud, F, Pantaleo, G, Perrin, L, Piffaretti, Jc, Rickenbach, M, Rudin, C, Schupbach, J, Speck, R, Tarr, P, Telenti, A, Trkola, A, Vernazza, P, Yerly, S, de Wolf, F, van Sighem, Ai, van Valkengoed, I, Gras, L, Bronsveld, W, Prins, Jm, Bos, Jc, Schattenkerk, Jkme, Godfried, Mh, Lange, Jma, Lowe, Sh, van der Meer, Jtm, Nellen, Fjb, Pogany, K, van der Poll, T, Ruys, Ta, Sankatsing, S, van der Valk, M, van Vonderen, Mga, Wit, Fwmn, van Eeden, A, ten Veen, Jh, van Dam, P, Hillebrand Haverkort, Me, Brinkman, K, Frissen, Phj, Weigel, Hm, Mulder, Jw, van Gorp, Ecm, Meenhorst, Pl, Mairuhu, Ata, Veenstra, J, Danner, Sa, Van Agtmael, Ma, Claessen, Fap, Geerlings, Se, Perenboom, Rm, Richter, C, van der Berg, J, van Leusen, R, Vriesendorp, R, Jeurissen, Fjf, Kauffmann, Rh, Koger, Elw, Bravenboer, B, ten Napel, Chh, Mudrikova, T, Sprenger, Hg, Miesen, Wmaj, ten Kate, Rw, van Houte, Dpf, Leemhuis, Mp, Pole, M, Kroon, Fp, Schippers, Ef, Schreij, G, van de Geest, S, Verbon, A, Koopmans, Pp, Telgt, M, van der Ven, Ajam, van der Ende, Me, Gyssens, Ic, de Marie, S, Nouwen, Jl, Juttmann, Jr, Schneider, Mme, Bonten, Mjm, Borleffs, Jcc, Hoepelman, Im, Jaspers, Cajj, Schouten, I, Schurink, Cam, Blok, Wl, Groenveld, Php, Jurriaans, S, Back, Nkt, Cuijpers, T, Rietra, Pjgm, Roozendaal, Kj, Pauw, W, van Zanten, Ap, Smits, Phm, von Blomberg, Bme, Savelkoul, P, Zaaijer, H, Swanink, C, Franck, Pfh, Lampe, A, Jansen, Cl, Hendriks, R, Schirm, J, Benne, D, Veenendaal, D, Storm, H, van Zeijl, Jh, Kroes, Acm, Claas, Hcj, Bruggeman, Camva, Goossens, Vj, Galama, Jmd, Poort, Yagm, Niesters, Mg, Osterhaus, Adme, Schutten, M, Buiting, Agm, Swaans, Cam, Boucher, Cab, Schuurman, R, Boel, E, Jansz, Af, Veldkamp, A, Beijnen, Jh, Crommentuyn, Kml, Huitema, Adr, Kappelhoff, B, de Maat, Mmr, Burger, Dm, Hugen, Pwh, Dabis, F, Thiebaut, R, Chene, G, Lawson Ayayi, S, Meyer, L, Boufassa, F, Hamouda, O, Touloumi, G, Hatzakis, A, Karafoulidou, A, Katsarou, O, Brettle, R, Del Amo, J, del Romero, J, van Asten, L, van Benthem, B, Prins, M, Coutinho, R, Kirk, O, Pedersen, C, Aguado, Ih, Perez Hoyos, S, Eskild, A, Bruun, Jn, Sannes, M, Lee, C, Johnson, Am, Babiker, A, Darbyshire, J, Gill, N, Porter, K, Vanhems, P, Kaldor, J, Ashton, L, Vizzard, J, Muga, R, Gill, J, Cayla, J, de Olalla, Pg, Day, Ne, De Angelis, D, Walker, S, Tyrer, F, Beral, V, Raffanti, S, Becker, S, Scarsella, A, Braun, J, Most, B, Balu, R, Gilbert, L, Fleenor, R, Ising, T, Dieterich, D, Fusco, J, Losso, M, Duran, A, Vetter, N, Clumeck, N, De Wit, S, Kabeya, K, Poll, B, Colebunders, R, Machala, L, Rozsypal, H, Nielsen, J, Lundgren, J, Olsen, Ch, Gerstoft, J, Katzenstein, T, Hansen, Abe, Skinhoj, P, Zilmer, K, Rauka, M, Katlama, C, De Sa, M, Viard, Jp, Saint Marc, T, Pradier, C, Dietrich, M, Manegold, C, van Lunzen, J, Stellbrink, Hj, Miller, V, Goebel, Fd, Salzberger, B, Rockstroh, J, Kosmidis, J, Gargalianos, P, Sambatakou, H, Perdios, J, Panos, G, Filandras, A, Banhegyi, D, Mulcahy, F, Yust, I, Burke, M, Pollack, S, Hassoun, J, Sthoeger, Z, Maayan, S, Vella, S, Chiesi, A, Pristera, R, Gabbuti, A, Bedini, A, Montesarchio, E, Santopadre, P, Franci, P, Castagna, Antonella, Viksna, L, Rozentale, B, Chaplinskas, S, Hemmer, R, Staub, T, Bruun, J, Maeland, A, Ormaasen, V, Knysz, B, Gasiorowski, J, Horban, A, Prokopowicz, D, Wiercinska Drapalo, A, Boron Kaczmarska, A, Pynka, M, Beniowski, M, Trocha, H, Smiatacz, T, Antunes, F, Mansinho, K, Maltez, F, Duiculescu, D, Streinu Cercel, A, Mokras, M, Stanekova, D, Gonzalez Lahoz, J, Diaz, B, Garcia Benayas, T, Martin Carbonero, L, Soriano, V, Clotet, B, Jou, A, Conejero, J, Tural, C, Gatell, Jm, Miro, Jm, Zamora, L, Blaxhult, A, Karlsson, A, Pehrson, P, Schiffer, V, Furrer, H, Chentsova, N, Barton, S, Mercey, D, Phillips, A, Youle, M, Johnson, Ma, Mocroft, A, Murphy, M, Weber, J, Scullard, G, Fisher, M, Loveday, C, Ruiz, L, Helm, Eb, Carlebach, A, Mosch, M, Muller, A, Haberl, A, Korn, S, Stephan, C, Bickel, M, Gute, P, Locher, L, Lutz, T, Klauke, S, Doerr, Hw, Sturmer, M, Dauer, B, Jennings, B, Alexander, C, Braitstein, P, Chan, K, Cote, H, Gataric, N, Harrigan, Pr, Harris, M, Bonner, S, Montaner, J, O'Shaughnessy, M, Wood, E, Yip, B, Chaloner, C, Gumley, H, Ransom, D, Sabin, Ca, Lipman, M, Johnson, M, Read, R, Paraninfo, G, Casari, S, Pan, A, Patroni, A, Torti, C, Quiros Roldan, E, Tomasoni, L, Moretti, F, Nasta, P, Uccelli, Mc, Bertelli, D, Nigro, M, Migliorino, M, Abeli, C, Maggiolo, F, Novati, S, Tinelli, C, Riccio, G, Borghi, V, and Esposito, R.
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Male ,HAART ,Human immunodeficiency virus (HIV) ,CD4 cell count ,HIV Infections ,CLINICAL PROGRESSION ,medicine.disease_cause ,THERAPY ,HAART REGIMEN ,Cohort Studies ,Risk Factors ,Adult, Anti-Retroviral Agents, CD4 Lymphocyte Count, Cohort Studies, Female, Follow-Up Studies, HIV Infections, HIV Protease Inhibitors, HIV-1, Humans, Male, Middle Aged, Proportional Hazards Models, Reverse Transcriptase Inhibitors, Risk Factors, Treatment Failure, Viral Load ,Medicine ,Treatment Failure ,Mortality rate ,Medicine (all) ,INHIBITOR ,General Medicine ,Middle Aged ,HUMAN IMMUNODEFICIENCY VIRUS TYPE 1 (HIV-1) ,BLIND CONTROLLED-TRIAL ,medicine.anatomical_structure ,Anti-Retroviral Agents ,Cohort ,HUMAN-IMMUNODEFICIENCY-VIRUS ,Reverse Transcriptase Inhibitors ,Female ,Off Treatment ,Viral load ,Cohort study ,Adult ,medicine.medical_specialty ,Settore MED/17 - Malattie Infettive ,T cell ,Internal medicine ,Humans ,COHORT ,Proportional Hazards Models ,business.industry ,Proportional hazards model ,DISEASE PROGRESSION ,HIV Protease Inhibitors ,HIV-INFECTED INDIVIDUALS ,CD4 Lymphocyte Count ,VIRAL LOAD ,Immunology ,HIV-1 ,business ,Follow-Up Studies - Abstract
Background Treatment strategies for patients in whom HIV replication is not suppressed after exposure to several drug classes remain unclear. We aimed to assess the inter-relations between viral load, CD4-cell count, and clinical outcome in patients who had experienced three-class virological failure.Methods We undertook collaborative joint analysis of 13 HIV cohorts from Europe, North America, and Australia, involving patients who had had three-class virological failure (viral load >1000 copies per mL for >4 months). Regression analyses were used to quantify the associations between CD4-cell-count slope, HIV-1 RNA concentration, treatment information, and demographic characteristics. Predictors of death were analysed by Cox's proportional-hazards models.Findings 2488 patients were included. 2118 (85%) had started antiretroviral therapy with single or dual therapy. During 5015 person-years of follow-up, 276 patients died (mortality rate 5.5 per 100 person-years; 3-year mortality risk 15.3% (95% Cl 13.5-17.3). Risk of death was strongly influenced by the latest CD4-cell count with a relative hazard of 15.8 (95% CI 9.28-27.0) for counts below 50 cells per muL versus above 200 cells per muL. The latest viral load did not independently predict death. For any given viral load, patients on treatment had more favourable CD4-cell-count slopes than those off treatment. For patients on treatment and with stable viral load, CD4-cell counts tended to be increasing at times when the current viral load was below 10 000 copies per mL or 1.5 log(10) copies per mL below off-treatment values.Interpretation In patients for whom viral-load suppression to below the level of detection is not possible, achievement and maintenance of a CD4-cell count above 200 per muL becomes the primary aim. Treatment regimens that maintain the viral load below 10 000 copies per mL or at least provide 1.5 log(10) copies per mL suppression below the off-treatment value do not seem to be associated with appreciable CD4-cell-count decline.
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- 2004
12. Editorial to the thematic issue climate change and microbiology.
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Piffaretti JC, Schink B, and Semenza JC
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- Animals, Ecosystem, Humans, Climate Change, Microbiology
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- 2018
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13. Antibiotic resistance: the emergence of plasmid-mediated colistin resistance enhances the need of a proactive one-health approach.
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Piffaretti JC
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- Communicable Diseases microbiology, Escherichia coli genetics, Gene Transfer, Horizontal genetics, Humans, Klebsiella pneumoniae genetics, Plasmids genetics, Colistin pharmacology, Communicable Diseases drug therapy, Drug Resistance, Bacterial genetics, Escherichia coli drug effects, Klebsiella pneumoniae drug effects
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- 2016
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14. Hepatitis C virus and GBV-C virus prevalence among patients with B-cell lymphoma in different European regions: a case-control study of the International Extranodal Lymphoma Study Group.
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Nicolosi Guidicelli S, Lopez-Guillermo A, Falcone U, Conconi A, Christinat A, Rodriguez-Abreu D, Grisanti S, Lobetti-Bodoni C, Piffaretti JC, Johnson PW, Mombelli G, Cerny A, Montserrat E, Cavalli F, and Zucca E
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- Adolescent, Adult, Aged, Aged, 80 and over, Antibodies, Viral blood, Case-Control Studies, Comorbidity, Female, Flaviviridae Infections virology, GB virus C immunology, Hepatitis C Antibodies blood, Hepatitis, Viral, Human virology, Humans, Leukemia, Lymphocytic, Chronic, B-Cell epidemiology, Male, Middle Aged, Pilot Projects, Prevalence, Prospective Studies, Seroepidemiologic Studies, Spain epidemiology, Switzerland epidemiology, Viral Envelope Proteins immunology, Waldenstrom Macroglobulinemia epidemiology, Young Adult, Flaviviridae Infections epidemiology, GB virus C isolation & purification, Hepatitis C epidemiology, Hepatitis, Viral, Human epidemiology, Lymphoma, B-Cell epidemiology
- Abstract
Hepatitis C virus (HCV) infection is associated with some B-cell non-Hodgkin lymphoma (B cell-NHLs). Patients with HCV infection frequently show co-infections with GB virus C (GBV-C, formerly known as hepatitis G virus), and some studies have suggested a higher incidence of GBV-C infection in patients with B cell-NHLs. The aim of this study was to prospectively evaluate the association between HCV and/or GBV-C infection and B cell-NHLs in different geographic areas. One hundred thirty-seven lymphoma cases and 125 non-lymphoma matched controls were enrolled in an international case-control study conducted in Switzerland (Bellinzona), Spain (Barcelona) and England (Southampton) on samples collected from 2001 to 2002. In Bellinzona (41 cases and 81 controls), the overall prevalence of HCV was 3.3% (4.9% in NHLs), and the overall prevalence of GBV-C was 24% (22% in NHLs). In Barcelona (46 cases and 44 controls), the prevalence of HCV was 10% (8.7% in NHLs) and the prevalence of GBV-C 20% (13% in NHLs). There was no statistically significant difference in the frequency of both infections between patients with NHL and controls. In Southampton, 50 NHL cases were analysed, none of them was found to be HCV-positive; therefore, no control group was analysed and GBV-C analysis was not performed, too. Both in Bellinzona and in Barcelona, the seropositivity rate was significantly lower for HCV than for GBV-C, suggesting that their transmission can be independent. The incidence of HCV was significantly higher in Barcelona than that in Bellinzona. This study confirmed the existence of marked geographic differences in the prevalence of HCV in NHL but cannot provide any significant evidence for an association between HCV and/or GBV-C and B-cell NHLs., (Copyright © 2011 John Wiley & Sons, Ltd.)
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- 2012
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15. 5-ALA derivative-mediated photoinactivation of Propionibacterium acnes.
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Fotinos N, Mikulic J, Convert M, Campo MA, Piffaretti JC, Gurny R, and Lange N
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- Aminolevulinic Acid therapeutic use, Gram-Positive Bacterial Infections microbiology, Humans, Light, Photochemotherapy, Protoporphyrins metabolism, Aminolevulinic Acid analogs & derivatives, Aminolevulinic Acid pharmacology, Gram-Positive Bacterial Infections drug therapy, Propionibacterium acnes drug effects
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- 2009
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16. Evidence of horizontal gene transfer between human and animal commensal Escherichia coli strains identified by microarray.
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Grasselli E, François P, Gutacker M, Gettler B, Benagli C, Convert M, Boerlin P, Schrenzel J, and Piffaretti JC
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- Animals, Base Composition, Chromosomes, Bacterial, Escherichia coli isolation & purification, Escherichia coli physiology, Genes, Bacterial, Humans, Multigene Family, Polymorphism, Genetic, Synteny, DNA, Bacterial genetics, Escherichia coli genetics, Gene Transfer, Horizontal, Microarray Analysis
- Abstract
Bacteria exchange genetic material by horizontal gene transfer (HGT). To evaluate the impact of HGT on Escherichia coli genome plasticity, 19 commensal strains collected from the intestinal floras of humans and animals were analyzed by microarrays. Strains were hybridized against an oligoarray containing 2700 E. coli K12 chromosomal genes. A core (genes shared among compared genomes) and a flexible gene pool (genes unique for each genome) have been identified. Analysis of hybridization signals evidenced 1015 divergent genes among the 19 strains and each strain showed a specific genomic variability pattern. Four hundred and fifty-eight genes were characterized by higher rates of interstrain variation and were considered hyperdivergent. These genes are not randomly distributed onto the chromosome but are clustered in precise regions. Hyperdivergent genes belong to the flexible gene pool and show a specific GC content, differing from that of the chromosome, indicating acquisition by HGT. Among these genes, those involved in defense mechanisms and cell motility as well as intracellular trafficking and secretion were far more represented than others. The observed genome plasticity contributes to the maintenance of genetic diversity and may therefore be a source of evolutionary adaptation and survival.
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- 2008
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17. Pre-formulation of liposomes against Helicobacter pylori: characterization and interaction with the bacteria.
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Bardonnet PL, Faivre V, Boullanger P, Piffaretti JC, and Falson F
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- Chemical Phenomena, Chemistry, Pharmaceutical, Chemistry, Physical, Chromatography, High Pressure Liquid, Drug Compounding, Electrochemistry, Excipients, Microscopy, Fluorescence, Particle Size, Phospholipids chemistry, Reverse Transcriptase Polymerase Chain Reaction, X-Ray Diffraction, Glycolipids chemistry, Helicobacter pylori drug effects, Liposomes chemistry
- Abstract
This paper deals with the formulation of targeted liposome against Helicobacter pylori. We describe the characterization of liposomes loaded with antimicrobial agents (ampicillin and metronidazole) and the quantification of the interactions between such formulations and bacteria. If the encapsulation rate of ampicillin seems not strongly affected by the change of phospholipidic composition, the encapsulation of metronidazole drastically decreased in epikuron 170 liposomes compared to DPPC ones. Furthermore, as observed with X-ray diffraction measurements, the presence of metronidazole results in the disorganisation of the phospholipid bilayers. Concerning the liposome-bacteria interactions, it has been observed that the incorporation of fucosyled glycolipids in the vesicle membrane leads to liposomes that are able to interact with the bacteria either in their spiral or in their coccoid forms. Since coccoid forms are occasionally found in vivo, their recognition by the liposomes we have formulated seems promising in the fight against Helicobacter pylori.
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- 2008
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18. Effects on gram-negative and gram-positive bacteria mediated by 5-aminolevulinic Acid and 5-aminolevulinic acid derivatives.
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Fotinos N, Convert M, Piffaretti JC, Gurny R, and Lange N
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- Aminolevulinic Acid chemistry, Escherichia coli drug effects, Escherichia coli growth & development, Escherichia coli K12 drug effects, Escherichia coli K12 growth & development, Esters chemistry, Esters pharmacology, Gram-Negative Bacteria growth & development, Gram-Positive Bacteria growth & development, Methicillin Resistance, Photosensitizing Agents chemistry, Porphyrins metabolism, Pseudomonas aeruginosa drug effects, Pseudomonas aeruginosa growth & development, Staphylococcus aureus drug effects, Staphylococcus aureus growth & development, Aminolevulinic Acid analogs & derivatives, Aminolevulinic Acid pharmacology, Gram-Negative Bacteria drug effects, Gram-Positive Bacteria drug effects, Photochemotherapy, Photosensitizing Agents pharmacology
- Abstract
Due mainly to the extensive use of antibiotics, the spread of multiresistant bacterial strains is one of the most worrying threats to public health. One strategy that can be used to overcome potential shortcomings might be the inactivation of these microorganisms by 5-aminolevulinic acid (5-ALA) or 5-ALA derivative-mediated photodynamic therapy (PDT). 5-ALA has no photoactive properties, but when it is given exogenously, it acts as a precursor of photosensitive porphyrins predominantly in tissues or organisms that are characterized by a high metabolic turnover, such as tumors, macrophages, and bacteria. However, the weak ability of 5-ALA to cross biological barriers has led to the introduction of more lipophilic derivatives, such as methyl aminolevulinate or hexyl aminolevulinate, which display improved capacities to reach the cytoplasm. Starting from the hypothesis that more lipophilic compounds carrying only a permanent positive charge under physiological conditions may more easily cross the bacterial multilayer barrier, we have tested the efficacies of some 5-ALA n-alkyl esters for the inactivation of bacteria. For this purpose, different bacterial strains were incubated with 5-ALA or its corresponding esters of different lipophilicities. Then, the bacteria were irradiated with light and the numbers of CFU post-PDT were counted and compared to those for the controls, which were kept in the dark. Furthermore, the total amount of accumulated porphyrins was quantified by high-pressure liquid chromatography analysis. In our studies, analysis of the bacterial extracts revealed the presence of all the porphyrins involved in heme biosynthesis, from uroporphyrin to protoporphyin IX. The efficacy of bacterial inactivation was a function of the total amount of porphyrins produced, independently of their nature. The 5-ALA methyl and butyl esters were the most effective compounds with respect to the photodynamic inactivation of bacteria. We observed significant differences in terms of the optimal drug concentration, bactericidal activities, and porphyrin production.
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- 2008
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19. Assessment of intraspecific mtDNA variability of European Ixodes ricinus sensu stricto (Acari: Ixodidae).
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Casati S, Bernasconi MV, Gern L, and Piffaretti JC
- Subjects
- Animals, Cytochromes b genetics, Electron Transport Complex IV genetics, Europe, Genetics, Population, Phylogeny, RNA, Ribosomal genetics, Sequence Analysis, DNA, DNA, Mitochondrial genetics, Genetic Variation, Ixodes genetics
- Abstract
The Ixodes ricinus complex is composed of 14 species distributed worldwide. Some members of this complex are involved in the transmission of a number of diseases to animals and humans, in particular Lyme borreliosis, tick-borne encephalitis, ehrlichiosis and babesiosis. While the phylogenetic relationships between species of the I. ricinus complex have been investigated in the past, still little is known about the genetic structure within the species I. ricinus sensu stricto. We have investigated the intraspecific variability among 26 I. ricinus s.s. ticks collected in various European countries, including Switzerland, Italy, Austria, Denmark, Sweden, and Finland by using five mitochondrial gene fragments corresponding to the control region, 12S rDNA, cytb, COI, and COII. The five genes considered here showed a low genetic variability (1.6-5%). Our results based on both statistical parsimony (applied to the COI + COII + cytb + 12S + CR data set, for a total of 3423 bp) and maximum parsimony (applied to the COI + COII + cytb + 12S data set, for a total of 2980 bp) did not provide any evidence for a correlation between the identified haplotypes and their geographic origin. Thus, the European I. ricinus s.s. ticks do not seem to show any phylogeography structure.
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- 2008
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20. HIV-1 coreceptor usage and CXCR4-specific viral load predict clinical disease progression during combination antiretroviral therapy.
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Weiser B, Philpott S, Klimkait T, Burger H, Kitchen C, Bürgisser P, Gorgievski M, Perrin L, Piffaretti JC, and Ledergerber B
- Subjects
- Adult, Disease Progression, Epidemiologic Methods, Female, HIV Infections immunology, Humans, Male, Treatment Outcome, Viral Load, Antiretroviral Therapy, Highly Active, HIV Infections drug therapy, HIV-1, Receptors, CXCR4 metabolism
- Abstract
Background: Although combination antiretroviral therapy (cART) dramatically reduces rates of AIDS and death, a minority of patients experience clinical disease progression during treatment., Objective: To investigate whether detection of CXCR4(X4)-specific strains or quantification of X4-specific HIV-1 load predict clinical outcome., Methods: From the Swiss HIV Cohort Study, 96 participants who initiated cART yet subsequently progressed to AIDS or death were compared with 84 contemporaneous, treated nonprogressors. A sensitive heteroduplex tracking assay was developed to quantify plasma X4 and CCR5 variants and resolve HIV-1 load into coreceptor-specific components. Measurements were analyzed as cofactors of progression in multivariable Cox models adjusted for concurrent CD4 cell count and total viral load, applying inverse probability weights to adjust for sampling bias., Results: Patients with X4 variants at baseline displayed reduced CD4 cell responses compared with those without X4 strains (40 versus 82 cells/microl; P = 0.012). The adjusted multivariable hazard ratio (HR) for clinical progression was 4.8 [95% confidence interval (CI) 2.3-10.0] for those demonstrating X4 strains at baseline. The X4-specific HIV-1 load was a similarly independent predictor, with HR values of 3.7 (95% CI, 1.2-11.3) and 5.9 (95% CI, 2.2-15.0) for baseline loads of 2.2-4.3 and > 4.3 log10 copies/ml, respectively, compared with < 2.2 log10 copies/ml., Conclusions: HIV-1 coreceptor usage and X4-specific viral loads strongly predicted disease progression during cART, independent of and in addition to CD4 cell count or total viral load. Detection and quantification of X4 strains promise to be clinically useful biomarkers to guide patient management and study HIV-1 pathogenesis.
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- 2008
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21. Comparative genomic hybridization and physiological characterization of environmental isolates indicate that significant (eco-)physiological properties are highly conserved in the species Escherichia coli.
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Ihssen J, Grasselli E, Bassin C, François P, Piffaretti JC, Köster W, Schrenzel J, and Egli T
- Subjects
- Environmental Microbiology, Escherichia coli genetics, Gene Expression Regulation, Bacterial, Genome, Bacterial, Molecular Sequence Data, Escherichia coli physiology, Escherichia coli Proteins, Glucose metabolism
- Abstract
Escherichia coli, the common inhabitant of the mammalian intestine, exhibits considerable intraspecies genomic variation, which has been suggested to reflect adaptation to different ecological niches. Also, regulatory trade-offs, e.g. between catabolic versatility and stress protection, are thought to result in significant physiological differences between strains. For these reasons, the relevance of experimental observations made for 'domesticated' E. coli strains with regard to the behaviour of this species in its natural environments is often questioned and doubts are frequently raised on the status of E. coli as a defined species. The variability of important (eco-)physiological functions, such as carbon substrate uptake and breakdown capabilities, as well as stress defence mechanisms, in the genomes of commensal and pathogenic E. coli strains were therefore investigated. Furthermore, (eco-)physiological properties of environmental strains were compared to standard laboratory strain K-12 MG1655. Catabolic, stress protection, and carbon- and energy source transport operons showed a very low intraspecies variability in 57 commensal and pathogenic E. coli. Environmental isolates adapted to glucose-limited growth in a similar way as E. coli MG1655, namely by increasing their catabolic flexibility and by inducing high-affinity substrate uptake systems. The results obtained indicate that significant (eco-)physiological properties are highly conserved in the natural population of E. coli. This questions the proposed dominant role of horizontal gene transfer for niche adaptation.
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- 2007
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22. Distribution and characterization of integrons in Escherichia coli strains of animal and human origin.
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Cocchi S, Grasselli E, Gutacker M, Benagli C, Convert M, and Piffaretti JC
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- Animals, Base Sequence, Cats, Cattle, Dogs, Escherichia coli isolation & purification, Humans, Molecular Sequence Data, Phylogeny, Poultry, Promoter Regions, Genetic genetics, Swine, Animal Diseases microbiology, Escherichia coli genetics, Escherichia coli Infections microbiology, Escherichia coli Infections veterinary, Integrons genetics
- Abstract
One hundred and twenty clinical and commensal Escherichia coli strains isolated in Switzerland from humans and from companion and farm animals were analysed for the prevalence of integrons of classes 1, 2, and 3 and for the characterization of their gene cassettes. The relationships between integron carriage and host category, and between integron carriage and phylogenetic E. coli lineage were also analysed. Integrons were detected in 48 (40%) of the isolates and were thus widely disseminated in the human and animal E. coli strains considered. Moreover, the association between integron carriage and certain animal categories (farm animals) suggests that animals that are raised for economic purposes might be exposed to a major antibiotic pressure. Finally, our data confirm that E. coli commensal strains represent a significant source of antibiotic-resistant determinants.
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- 2007
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23. Diversity of the population of Tick-borne encephalitis virus infecting Ixodes ricinus ticks in an endemic area of central Switzerland (Canton Bern).
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Casati S, Gern L, and Piffaretti JC
- Subjects
- 5' Untranslated Regions genetics, Animals, Base Sequence, Capsid Proteins genetics, Encephalitis Viruses, Tick-Borne isolation & purification, Molecular Sequence Data, Phylogeny, Point Mutation, RNA, Viral genetics, Reverse Transcriptase Polymerase Chain Reaction, Sequence Analysis, DNA, Switzerland, Encephalitis Viruses, Tick-Borne classification, Encephalitis Viruses, Tick-Borne genetics, Genetic Variation, Ixodes virology
- Abstract
Tick-borne encephalitis virus (TBEV), a member of the genus Flavivirus, has a positive-strand RNA genome containing a single open reading frame flanked by non-coding regions (NCRs). Ixodes ricinus ticks (n = 307) were collected from vegetation in a natural TBEV focus in Belp, Switzerland. The presence and identity of the virus were determined by nested RT-PCR followed by sequencing of the 5'-terminal region that comprises the 5' NCR and the capsid-encoding region (C). The presence of the western European TBEV subtype (W-TBEV) genome was detected in 14.3 % of the ticks. Nucleotide sequence analysis revealed a high variability of 55.5 %. In particular, four DNA fragments (CS 'A', CS 'B', the folding-stem structure and the start codon) showed substantial heterogeneity, which has the potential of compromising replication, translation and packaging of the viral genome. This variability may reflect a viral strategy to select the fittest RNA molecule to produce a viral infection in the different vertebrate hosts that may be encountered by the ticks. It may also indicate a possible ancient introduction of TBEV to the Belp site. In addition, it may contribute to explaining the annual low incidence of tick-borne encephalitis in the natural focus of Belp, despite the high prevalence of TBEV genomes in ticks.
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- 2006
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24. Gastroretentive dosage forms: overview and special case of Helicobacter pylori.
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Bardonnet PL, Faivre V, Pugh WJ, Piffaretti JC, and Falson F
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- Capsules, Delayed-Action Preparations pharmacokinetics, Delayed-Action Preparations therapeutic use, Drug Delivery Systems methods, Gastric Mucosa metabolism, Helicobacter Infections drug therapy, Helicobacter Infections microbiology, Helicobacter pylori drug effects, Humans, Stomach microbiology, Tablets, Delayed-Action Preparations administration & dosage, Gastrointestinal Transit drug effects, Stomach drug effects
- Abstract
The challenge to develop efficient gastroretentive dosage forms began about 20 years ago, following the discovery of Helicobacter pylori by Warren and Marshall. In order to understand the real difficulty of increasing the gastric residence time of a dosage form, we have first summarized the important physiologic parameters, which act upon the gastric residence time. Afterwards, we have reviewed the different drug delivery systems designed until now, i.e. high-density, intragastric floating, expandable, superporous hydrogel, mucoadhesive and magnetic systems. Finally, we have focused on gastroretentive dosage forms especially designed against H. pylori, including specific targeting systems against this bacterium.
- Published
- 2006
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25. Presence of potentially pathogenic Babesia sp. for human in Ixodes ricinus in Switzerland.
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Casati S, Sager H, Gern L, and Piffaretti JC
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- Animals, Babesia classification, Babesia pathogenicity, Babesia microti isolation & purification, Babesia microti pathogenicity, Babesiosis transmission, Base Sequence, DNA, Protozoan chemistry, Molecular Sequence Data, Phylogeny, RNA, Ribosomal, 18S chemistry, Species Specificity, Switzerland epidemiology, Arachnid Vectors parasitology, Babesia isolation & purification, Ixodes parasitology, Polymerase Chain Reaction methods
- Abstract
We have designed and performed a new PCR method based on the 18S rRNA in order to individuate the presence and the identity of Babesia parasites. Out of 1159 Ixodes ricinus (Acari: Ixodidae) ticks collected in four areas of Switzerland, nine were found to contain Babesia DNA. Sequencing of the short amplicon obtained (411-452 bp) allowed the identification of three human pathogenic species: Babesia microti, B. divergens, for the first time in Switzerland, Babesia sp. EU1. We also report coinfections with B. sp. EU1-Borrelia burgdorferi sensu stricto and Babesia sp. EU1-B. afzelii.
- Published
- 2006
26. Comparison of LightCycler PCR and culture for detection of group B streptococci from vaginal swabs.
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Convert M, Martinetti Lucchini G, Dolina M, and Piffaretti JC
- Subjects
- Bacterial Typing Techniques, Cell Culture Techniques, Culture Media, Female, Humans, Polymerase Chain Reaction economics, Pregnancy, Streptococcus agalactiae classification, Streptococcus agalactiae genetics, Vagina microbiology, Vaginal Smears, DNA, Bacterial analysis, Polymerase Chain Reaction methods, Streptococcus agalactiae isolation & purification
- Abstract
Group B streptococci (GBS) are an important cause of neonatal sepsis and meningitis. New rapid, sensitive and specific methods for detection of GBS in pregnant women are needed in order to provide timely treatment of neonates. The sensitivity, specificity and cost of a LightCycler PCR method was compared with selective culture for the detection of GBS from 400 vaginal swabs. In addition, two DNA extraction methods (simple boiling and automated DNA extraction by Roche MagNA Pure LC) were compared for a subgroup of 100 clinical samples. The sensitivity of the LightCycler PCR assay for the detection of GBS from vaginal swabs was significantly higher than that of culture. There were no culture-positive, LightCycler PCR-negative cases. The efficiencies of the two DNA extraction procedures were not significantly different. The detection of GBS from vaginal swabs by the molecular method (including simple boiling extraction) required the same hands-on time, but the procedure was completed in 1.5 h, compared with c. 48 h for the culture-based approach. Disadvantages of the molecular method are the increased costs (45%) and the absence of antibiogram data. The LightCycler PCR is a promising tool for sensitive, specific and rapid detection of GBS directly from clinical specimens of pregnant women.
- Published
- 2005
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27. Human adaptive immune system Rag2-/-gamma(c)-/- mice.
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Chicha L, Tussiwand R, Traggiai E, Mazzucchelli L, Bronz L, Piffaretti JC, Lanzavecchia A, and Manz MG
- Subjects
- Animals, Antigens, CD34 immunology, Cell Transplantation, Cystatin C, Cystatins deficiency, Cystatins genetics, DNA-Binding Proteins, Fetal Blood cytology, Humans, Infant, Newborn, Lymphocytes cytology, Lymphocytes immunology, Mice, Mice, Mutant Strains, Nuclear Proteins, Transplantation, Heterologous, Cystatins physiology, Immune System physiology
- Abstract
Although many biologic principles are conserved in mice and humans, species-specific differences exist, for example, in susceptibility and response to pathogens, that often do not allow direct implementation of findings in experimental mice to humans. Research in humans, however, for ethical and practical reasons, is largely restricted to in vitro assays that lack components and the complexity of a living organism. To nevertheless study the human hematopoietic and immune system in vivo, xenotransplantation assays have been developed that substitute human components to small animals. Here, we summarize our recent findings that transplantation of human cord blood CD34(+) cells to newborn Rag2(-/-)gamma(c)(-/-) mice leads to de novo development of major functional components of the human adaptive immune system. These human adaptive immune system Rag2(-/-)gamma(c)(-/-) (huAIS-RG) mice can now be used as a technically straightforward preclinical model to evaluate in vivo human adaptive immune system development as well as immune responses, for example, to vaccines or live infectious pathogens.
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- 2005
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28. Diversity within Borrelia burgdorferi sensu lato genospecies in Switzerland by recA gene sequence.
- Author
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Casati S, Bernasconi MV, Gern L, and Piffaretti JC
- Subjects
- Animals, Borrelia burgdorferi Group isolation & purification, Cats, Cattle, DNA, Bacterial chemistry, DNA, Bacterial isolation & purification, Dogs, Genetic Variation, Goats, Humans, Larva microbiology, Molecular Epidemiology, Molecular Sequence Data, Nymph microbiology, Phylogeny, Reverse Transcriptase Polymerase Chain Reaction, Sequence Analysis, DNA, Sequence Homology, Switzerland, Borrelia burgdorferi Group classification, Borrelia burgdorferi Group genetics, Ixodes microbiology, Rec A Recombinases genetics
- Abstract
A total of 874 Ixodes ricinus ticks were collected in Switzerland to investigate the genetic diversity of the Borrelia population. We integrated to the RT-PCR method the DNA sequence analysis of a 162-bp fragment of the recA gene. Five genospecies were detected: Borrelia afzelii, Borrelia burgdorferi s.s., Borrelia garinii, Borrelia valaisiana, and Borrelia lusitaniae. A heterogeneous distribution was observed within the B. burgdorferi s.l. genospecies. The most prevalent and diverse genospecies found in Switzerland was Borrelia afzelii, which might suggest a rapid evolution of this genospecies.
- Published
- 2004
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29. Development of a human adaptive immune system in cord blood cell-transplanted mice.
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Traggiai E, Chicha L, Mazzucchelli L, Bronz L, Piffaretti JC, Lanzavecchia A, and Manz MG
- Subjects
- Animals, Animals, Newborn, Antigens, CD34 analysis, B-Lymphocytes cytology, Bone Marrow Cells immunology, Dendritic Cells cytology, Dendritic Cells, Follicular cytology, Dendritic Cells, Follicular immunology, Epstein-Barr Virus Infections immunology, Gene Rearrangement, T-Lymphocyte, Humans, Immunoglobulins analysis, Infant, Newborn, Lymph Nodes cytology, Lymph Nodes immunology, Lymphocyte Activation, Major Histocompatibility Complex, Mice, Mice, Inbred BALB C, Mice, Mutant Strains, Spleen cytology, Spleen immunology, T-Lymphocytes cytology, Tetanus Toxoid immunology, Thymus Gland cytology, Thymus Gland immunology, Transplantation, Heterologous, B-Lymphocytes immunology, Dendritic Cells immunology, Fetal Blood cytology, Hematopoietic Stem Cell Transplantation, Immune System physiology, T-Lymphocytes immunology
- Abstract
Because ethical restrictions limit in vivo studies of the human hemato-lymphoid system, substitute human to small animal xenotransplantation models have been employed. Existing models, however, sustain only limited development and maintenance of human lymphoid cells and rarely produce immune responses. Here we show that intrahepatic injection of CD34+ human cord blood cells into conditioned newborn Rag2-/-gammac-/- mice leads to de novo development of B, T, and dendritic cells; formation of structured primary and secondary lymphoid organs; and production of functional immune responses. This provides a valuable model to study development and function of the human adaptive immune system in vivo.
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- 2004
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30. Prevalence of human T-cell leukemia virus types I and II in Switzerland.
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Böni J, Bisset LR, Burckhardt JJ, Joller-Jemelka HI, Bürgisser P, Perrin L, Gorgievski M, Erb P, Fierz W, Piffaretti JC, and Schüpbach J
- Subjects
- Blood Donors, Blotting, Western, Enzyme-Linked Immunosorbent Assay, HTLV-I Infections virology, HTLV-II Infections virology, Humans, Leukocytes, Mononuclear virology, Polymerase Chain Reaction, Prevalence, Sequence Analysis, DNA, Switzerland epidemiology, Virus Cultivation, HTLV-I Infections epidemiology, HTLV-II Infections epidemiology, Human T-lymphotropic virus 1 immunology, Human T-lymphotropic virus 2 immunology
- Abstract
The retroviruses human immunodeficiency virus (HIV)-1/2 and human T-cell leukemia virus (HTLV)-I/II share modes of transmission, suggesting that efforts to monitor the current HIV-1 epidemic in Switzerland should be complemented by assessment of HTLV-I/II prevalence. This study presents an updated evaluation of HTLV-I/II infection among groups within the Swiss population polarized towards either low or increased risk of infection. Archived serum and peripheral blood mononuclear cell (PBMC) samples were examined for evidence of HTLV-I/II infection by enzyme-linked immunosorbant assay (ELISA), type-specific Western blot, type-specific polymerase chain reaction (PCR), DNA sequence analysis, and virus culture. Among blood donations obtained from low-risk Swiss donors, we report a complete lack of HTLV-II infection and the occurrence of HTLV-I infection limited to a prevalence of 0.079 per 100,000 (1/1,266,466). Among high-risk HIV-positive persons and HIV-negative persons at increased risk of HIV-infection, we report a focus of HTLV-I and HTLV-II infection at prevalence rates of 62 per 100,000 (1/1,620) and 309 per 100,000 (5/1,620), respectively. The finding of low HTLV-I/II prevalence among Swiss blood donors and containment of HTLV-I/II infection within known risk-groups does not support initiation of HTLV-I/II screening for Swiss blood, tissue, and organ donations., (Copyright 2004 Wiley-Liss, Inc.)
- Published
- 2004
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31. Population genetics of Vibrio vulnificus: identification of two divisions and a distinct eel-pathogenic clone.
- Author
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Gutacker M, Conza N, Benagli C, Pedroli A, Bernasconi MV, Permin L, Aznar R, and Piffaretti JC
- Subjects
- Animals, Bacterial Typing Techniques, Electrophoresis methods, Fish Diseases microbiology, Genetic Variation, Genetics, Population, Glutamate-Ammonia Ligase genetics, Humans, Molecular Sequence Data, Phylogeny, Random Amplified Polymorphic DNA Technique, Rec A Recombinases genetics, Sequence Analysis, DNA, Vibrio Infections veterinary, Vibrio vulnificus pathogenicity, Eels microbiology, Vibrio Infections microbiology, Vibrio vulnificus classification, Vibrio vulnificus genetics
- Abstract
Genetic relationships among 62 Vibrio vulnificus strains of different geographical and host origins were analyzed by multilocus enzyme electrophoresis (MLEE), random amplification of polymorphic DNA (RAPD), and sequence analyses of the recA and glnA genes. Out of 15 genetic loci analyzed by MLEE, 11 were polymorphic. Cluster analysis identified 43 distinct electrophoretic types (ETs) separating the V. vulnificus population into two divisions (divisions I and II). One ET (ET 35) included all indole-negative isolates from diseased eels worldwide (biotype 2). A second ET (ET 2) marked all of the strains from Israel isolated from patients who handled St. Peter's fish (biotype 3). RAPD analysis of the 62 V. vulnificus isolates identified 26 different profiles separated into two divisions as well. In general, this subdivision was comparable (but not identical) to that observed by MLEE. Phylogenetic analysis of 543 bp of the recA gene and of 402 bp of the glnA gene also separated the V. vulnificus population into two major divisions in a manner similar to that by MLEE and RAPD. Sequence data again indicated the overall subdivision of the V. vulnificus population into different biotypes. In particular, indole-negative eel-pathogenic isolates (biotype 2) on one hand and the Israeli isolates (biotype 3) on the other tended to cluster together in both gene trees. None of the methods showed an association between distinct clones and human clinical manifestations. Furthermore, except for the Israeli strains, only minor clusters comprising geographically related isolates were observed. In conclusion, all three approaches (MLEE, RAPD, and DNA sequencing) generated comparable but not always equivalent results. The significance of the two divisions (divisions I and II) still remains to be clarified, and a reevaluation of the definition of the biotypes is also needed.
- Published
- 2003
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32. Clinical implications of Mycobacterium kansasii species heterogeneity: Swiss National Survey.
- Author
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Taillard C, Greub G, Weber R, Pfyffer GE, Bodmer T, Zimmerli S, Frei R, Bassetti S, Rohner P, Piffaretti JC, Bernasconi E, Bille J, Telenti A, and Prod'hom G
- Subjects
- Adult, Data Collection, Female, Humans, Male, Middle Aged, Mycobacterium kansasii classification, Mycobacterium kansasii pathogenicity, Switzerland, Genetic Variation, Mycobacterium kansasii genetics
- Abstract
Several subtypes of Mycobacterium kansasii have been described, but their respective pathogenic roles are not clear. This study investigated the distribution of subtypes and the pathogenicity of M. kansasii strains (n = 191) isolated in Switzerland between 1991 and 1997. Demographic, clinical, and microbiological information was recorded from clinical files. Patients were classified as having an infection according to the criteria of the American Thoracic Society. Subtypes were defined by PCR-restriction enzyme analysis of the hsp65 gene. Subtype 1 comprised 67% of the isolates (n = 128), while subtypes 2 and 3 comprised 21% (n = 40) and 8% (n = 15), respectively. Other subtypes (subtypes 4 and 6 and a new subtype, 7) were recovered from only 4% of patients (n = 8). M. kansasii subtype 1 was considered pathogenic in 81% of patients, while M. kansasii subtype 2 was considered pathogenic in 67% of patients and other subtypes were considered pathogenic in 6% of patients. The majority of patients with M. kansasii subtype 2 were immunocompromised due to the use of corticosteroids (21% of patients) or coinfection with HIV (62.5% of patients). Subtyping M. kansasii may improve clinical management by distinguishing pathogenic from nonpathogenic subtypes.
- Published
- 2003
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33. Rhipicephalus ticks infected with Rickettsia and Coxiella in Southern Switzerland (Canton Ticino).
- Author
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Bernasconi MV, Casati S, Péter O, and Piffaretti JC
- Subjects
- Animals, DNA, Ribosomal, Dogs parasitology, Molecular Sequence Data, Phylogeny, Polymerase Chain Reaction, Sequence Analysis, DNA, Switzerland, Ticks classification, Ticks genetics, Coxiella genetics, Gram-Negative Bacterial Infections epidemiology, Rickettsia genetics, Rickettsia Infections epidemiology, Ticks microbiology
- Abstract
Ticks of the Rhipicephalus sanguineus species complex may be vector of various pathogens including Rickettsia conorii (the etiological agent of the Mediterranean spotted fever) and Coxiella burnetii (cause of the Query (Q) fever). R. sanguineus ticks have been imported in several parts of central and northern Europe, especially in environments such as kennels and houses providing the appropriate microclimatic conditions and the blood source necessary for their survival. Since 1940 these ticks have occasionally been recorded in Switzerland. In Ticino (the southern part of Switzerland), they have been reported since 1980 and their probable establishment in this area has been suggested in the '90s. By means of PCR and direct sequencing, we tested the identity of these ticks (using 12S rDNA gene) and the occurrence of Rickettsia spp. (using 16S rDNA, gltA and OmpA genes) as well as Coxiella sp. (using 16S rDNA). The results indicated that in Ticino, two different tick species coexist, i.e. R. sanguineus sensu stricto and Rhipicephalus turanicus. A few individuals of R. sanguineus sensu stricto are infected with Rickettsia massiliae/Bar29, which are strains of unknown pathogenicity. Coxiella sp., an endosymbiont of Rhipicephalus ticks, has also been identified in both tick species. Due to climatic changes towards global warming, imported tick species may therefore adapt to new area and might be considered as epidemiological markers for a number of infectious agents transmitted by them.
- Published
- 2002
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34. The European Centre for Infectious Diseases: an adequate response to the challenges of bioterrorism and major natural infectious threats.
- Author
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Tibayrenc M, Mas-Coma S, Piffaretti JC, and Struelens M
- Subjects
- Europe, Bioterrorism prevention & control, Communicable Disease Control
- Published
- 2002
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35. RecA and glnA sequences separate the bacteroides fragilis population into two genetic divisions associated with the antibiotic resistance genotypes cepA and cfiA.
- Author
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Gutacker M, Valsangiacomo C, Bernasconi MV, and Piffaretti JC
- Subjects
- Bacteroides fragilis drug effects, Bacteroides fragilis genetics, Base Sequence, Genetic Variation, Genotype, Molecular Sequence Data, Phylogeny, Bacterial Proteins, Bacteroides fragilis classification, Drug Resistance, Bacterial genetics, Glutamate-Ammonia Ligase genetics, Rec A Recombinases genetics, beta-Lactamases genetics
- Abstract
The sequences of part of the glutamine synthetase-encoding gene (glnA) and of the RecA-encoding gene (recA) were determined and aligned for 45 Bacteroides fragilis isolates from different clinical and geographical origin. The patterns of sequence divergence of glnA and recA were very similar. The sequences of a 303-bp fraction of recA showed 45 nucleotide substitutions, 40 of which allowed the separation of B. fragilis into two major divisions, which were not found when the deduced amino acid sequences were considered. The 687-bp sequences analysed for the glnA gene showed 112 nucleotide substitutions, 96 of which separated the population into the same two divisions as those described for recA. In this case, the deduced amino acid sequences showed this subdivision as well: three of the six observed amino acid substitutions were division-specific. Within the two divisions, both genes presented a high degree of sequence conservation. Each B. fragilis division was associated with the presence of a different antibiotic resistance gene: cepA encoding a serine-beta-lactamase (division I) and cfiA encoding a metallo-beta-lactamase (division II). No particular clusters associated with geographical or clinical origin, or with the production of an enterotoxin were observed. Sequencing of the cfiA gene allowed identification of two different alleles in division II. However, no association of these different cfiA alleles with the expression of imipenem resistance was observed. In conclusion, the phylogenetic patterns observed by sequencing recA and glnA are in agreement with those obtained previously by MLEE (multilocus enzyme electrophoresis). Thus, it appears that the evolution of recA and glnA genes is similar to that of the whole chromosome of B. fragilis. Horizontal gene transfer between divisions I and II seems to be low, at best. However, the results of the present study could not clarify definitively whether divisions I and II should be considered as two different B. fragilis genospecies.
- Published
- 2002
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36. Molecular population genetic analysis of Campylobacter jejuni HS:19 associated with Guillain-Barré syndrome and gastroenteritis.
- Author
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Nachamkin I, Engberg J, Gutacker M, Meinersman RJ, Li CY, Arzate P, Teeple E, Fussing V, Ho TW, Asbury AK, Griffin JW, McKhann GM, and Piffaretti JC
- Subjects
- Campylobacter Infections microbiology, Campylobacter jejuni classification, Campylobacter jejuni enzymology, Campylobacter jejuni isolation & purification, Canada, China, DNA, Bacterial analysis, Denmark, Electrophoresis methods, Gastroenteritis microbiology, Gene Amplification, Humans, Japan, Mexico, South Africa, United Kingdom, United States, Campylobacter Infections complications, Campylobacter jejuni genetics, DNA, Bacterial genetics, Gastroenteritis complications, Guillain-Barre Syndrome microbiology
- Abstract
Infection with Campylobacter jejuni serotype HS:19 is associated with the development of Guillain-Barré syndrome (GBS). To determine whether a particular HS:19 clone is associated with GBS, multilocus enzyme electrophoresis (MLEE) was used to analyze a worldwide collection of isolates. There were 34 electropherotypes (ETs) in 3 phylogenetic clusters among 83 C. jejuni isolates. Cluster I contained all HS:19 strains, and a single ET (ET4) accounted for most HS:19 strains. HS:19 strains did not occur in any of the other clusters. ET4 contained isolates from different geographic locations, indicating global spread of this clone. Furthermore, ET4 contained isolates from patients with uncomplicated enteritis and GBS, as well as isolates from animal sources. The results of this study show that HS:19 strains comprise a clonal, although not monomorphic, population, which is distinct from non-HS:19 strains within C. jejuni. A unique clone associated with GBS was not identified by use of MLEE.
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- 2001
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37. Absence of clonality of Campylobacter jejuni in serotypes other than HS:19 associated with Guillain-Barré syndrome and gastroenteritis.
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Engberg J, Nachamkin I, Fussing V, McKhann GM, Griffin JW, Piffaretti JC, Nielsen EM, and Gerner-Smidt P
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- Campylobacter jejuni isolation & purification, Canada, China, Cloning, Molecular, Denmark, Electrophoresis, Gel, Pulsed-Field, Flagellin genetics, Humans, Japan, Mexico, Serotyping, South Africa, United Arab Emirates, United Kingdom, United States, Campylobacter Infections complications, Campylobacter Infections microbiology, Campylobacter jejuni classification, Gastroenteritis microbiology, Guillain-Barre Syndrome microbiology
- Abstract
Guillain-Barré syndrome (GBS) is recognized as a complication that occurs after Campylobacter infection. Certain Penner serotypes, such as HS:19, are linked particularly to GBS in some parts of the world, and there is good evidence for restricted genetic diversity in these isolates. However, GBS also occurs after Campylobacter infection due to other serotypes. Therefore, we asked whether Campylobacter jejuni non-HS:19 serotypes associated with GBS have a clonal structure and differ from strains isolated from patients with Campylobacter gastroenteritis. A worldwide selected population of C. jejuni non-HS:19 strains associated with GBS and gastroenteritis was analyzed by use of multilocus enzyme electrophoresis, automated ribotyping, pulsed-field gel electrophoresis, and flagellin gene typing. The results show that these isolates represent a heterogenic population and do not constitute a unique population across serotypes. No epidemiologic marker for GBS-associated strains was identified.
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- 2001
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38. Population genetics of Helicobacter pylori in the southern part of Switzerland analysed by sequencing of four housekeeping genes (atpD, glnA, scoB and recA), and by vacA, cagA, iceA and IS605 genotyping.
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Maggi Solcà N, Bernasconi MV, Valsangiacomo C, Van Doorn LJ, and Piffaretti JC
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- Biopsy, DNA Transposable Elements genetics, DNA, Bacterial analysis, Asia, Eastern, Genetics, Population, Genotype, Helicobacter pylori pathogenicity, Humans, Molecular Sequence Data, Phylogeny, Polymerase Chain Reaction, Sequence Analysis, DNA, South Africa, Stomach microbiology, Stomach surgery, Switzerland, Virulence, Genes, Bacterial, Helicobacter Infections microbiology, Helicobacter pylori genetics
- Abstract
The population biology of 78 Helicobacter pylori strains (71 from Swiss Italian, 4 from East Asian and 3 from South African patients) was investigated by sequence analysis of four housekeeping genes: atpD, scoB, glnA and recA. The vacA genotype, the presence of cagA and IS605, the iceA allelic type, and the resistance to metronidazole, clarithromycin and amoxycillin were determined. A high percentage of DNA polymorphic sites (19.8% for atpD, 21.3% for scoB, 23.7% for glnA and 20.3% for recA) was found. The phylogenetic trees based on the nucleotide sequences of the four gene fragments showed different topologies and were incongruent. The virulence-associated markers were distributed over the dendrograms and no association was found with phylogenetic clusters or clinical manifestations (chronic gastritis, gastric or duodenal ulcer, MALT lymphoma). Moreover, the H ratios (calculated with the homoplasy test) ranged from 0.742 to 0.799, depending on the gene fragment examined. All these observations suggest that H. pylori exists as a recombinant population. The clustering of the strains according to their geographical origin (USA/Europe, East Asia, South Africa) that has recently been demonstrated elsewhere could only be confirmed for the East Asian vacA s1c strains. In contrast, the South African strains clustered together only in the atpD tree. Presumably, recombination at the different loci has masked the evolutionary relationship among the strains.
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- 2001
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39. Clinical progression, survival, and immune recovery during antiretroviral therapy in patients with HIV-1 and hepatitis C virus coinfection: the Swiss HIV Cohort Study.
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Greub G, Ledergerber B, Battegay M, Grob P, Perrin L, Furrer H, Burgisser P, Erb P, Boggian K, Piffaretti JC, Hirschel B, Janin P, Francioli P, Flepp M, and Telenti A
- Subjects
- Adolescent, Adult, CD4 Lymphocyte Count, Cohort Studies, Disease Progression, Female, Hepatitis C complications, Humans, Male, Middle Aged, Prospective Studies, Survival Analysis, Switzerland, Viral Load, Viremia etiology, AIDS-Related Opportunistic Infections drug therapy, Anti-HIV Agents therapeutic use, Hepatitis C drug therapy
- Abstract
Background: Hepatitis C virus (HCV) infection is highly prevalent among HIV-1-infected individuals, but its contribution to the morbidity and mortality of coinfected patients who receive potent antiretroviral therapy is controversial. We used data from the ongoing Swiss HIV Cohort Study to analyse clinical progression of HIV-1, and the virological and immunological response to potent antiretroviral therapy in HIV-1-infected patients with or without concurrent HCV infection., Methods: We analysed prospective data on survival, clinical disease progression, suppression of HIV-1 replication, CD4-cell recovery, and frequency of changes in antiretroviral therapy according to HCV status in 3111 patients starting potent antiretroviral therapy., Results: 1157 patients (37.2%) were coinfected with HCV, 1015 of whom (87.7%) had a history of intravenous drug use. In multivariate Cox's regression, the probability of progression to a new AIDS-defining clinical event or to death was independently associated with HCV seropositivity (hazard ratio 1.7 [95% CI 1.26-2.30]), and with active intravenous drug use (1.38 [1.02-1.88]). Virological response to antiretroviral therapy and the probability of treatment change were not associated with HCV serostatus. In contrast, HCV seropositivity was associated with a smaller CD4-cell recovery (hazard ratio for a CD4-cell count increase of at least 50 cells/microL=0.79 [0.72-0.87])., Interpretation: HCV and active intravenous drug use could be important factors in the morbidity and mortality among HIV-1-infected patients, possibly through impaired CD4-cell recovery in HCV seropositive patients receiving potent antiretroviral therapy. These findings are relevant for decisions about optimum timing for HCV treatment in the setting of HIV infection.
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- 2000
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40. Mechanism of metronidazole resistance in Helicobacter pylori: comparison of the rdxA gene sequences in 30 strains.
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Solcà NM, Bernasconi MV, and Piffaretti JC
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- Amino Acid Sequence, Bacterial Proteins classification, Helicobacter pylori drug effects, Humans, Membrane Proteins classification, Molecular Sequence Data, Phylogeny, Point Mutation, Sequence Homology, Amino Acid, Anti-Bacterial Agents pharmacology, Bacterial Proteins genetics, Drug Resistance, Microbial genetics, Helicobacter pylori genetics, Membrane Proteins genetics, Metronidazole pharmacology
- Abstract
The rdxA gene of 30 independently isolated Helicobacter pylori strains was sequenced. A comparison of the rdxA sequences revealed a higher percentage of amino acid substitutions in the corresponding protein than in other housekeeping genes. Out of 122 point mutations, 41 were missense and 4 were nonsense. A resistant strain with a nucleotide insertion in the rdxA sequence was also found. With the exception of the point mutations and the insertion generating a stop signal, no particular nucleotide mutation or amino acid substitution could be associated to metronidazole resistance. Moreover, phylogenetic analysis of the 30 nucleotide sequences did not demonstrate specific clusters associated with the resistance phenotype.
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- 2000
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41. Phylogeny of the scathophagidae (Diptera, calyptratae) based on mitochondrial DNA sequences.
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Bernasconi MV, Pawlowski J, Valsangiacomo C, Piffaretti JC, and Ward PI
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- Animals, Classification, Electron Transport Complex IV genetics, Phylogeny, Polymerase Chain Reaction, Sequence Analysis, DNA, Species Specificity, DNA, Mitochondrial genetics, Diptera classification, Diptera genetics
- Abstract
The family Scathophagidae constitutes, together with members of the families Muscidae, Fannidae, and Anthomyiidae, the Muscoidea superfamily. The species Scathophaga stercoraria has been used extensively to investigate questions in animal ecology and evolution, particularly as a model system for studies of sperm competition and life history evolution. However, no phylogenetic studies have ever been performed on the Scathophagidae and the relationships within this family remain unclear. This study represents a molecular approach aimed at uncovering the phylogenetic relationships among 61 species representing 22 genera of Scathophagidae. A fragment of the terminal region of the mitochondrial gene COI (subunit I of the cytochrome oxidase gene) was sequenced in scathophagid species covering a wide geographic area, as well as a diverse spectrum of ecological habitats. Several clades grouping different genera and species have been identified, but the resolution power of the COI was insufficient to establish the exact relationships between these clades. The molecular data confirm the existence of a group consisting of the genera Delina, Chylizosoma, and Americina, which could represent the subfamily Delinae. Concerning the controversial position of the genus Phrosia, our data clearly suggest that it should be removed from the Delinae and placed within the genus Cordilura. Monophyly of most genera was confirmed, except for the genus Scathophaga, which should be divided into several different taxa., (Copyright 2000 Academic Press.)
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- 2000
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42. Identification of two genetic groups in Bacteroides fragilis by multilocus enzyme electrophoresis: distribution of antibiotic resistance (cfiA, cepA) and enterotoxin (bft) encoding genes.
- Author
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Gutacker M, Valsangiacomo C, and Piffaretti JC
- Subjects
- Alleles, Animals, Bacterial Toxins genetics, Bacteroides fragilis drug effects, Bacteroides fragilis enzymology, Cluster Analysis, DNA, Bacterial analysis, DNA, Ribosomal analysis, Drug Resistance, Microbial genetics, Electrophoresis, Starch Gel, Humans, Imipenem pharmacology, Metalloendopeptidases genetics, Microbial Sensitivity Tests, Molecular Sequence Data, Pentosyltransferases analysis, Pentosyltransferases genetics, Polymerase Chain Reaction, Polymorphism, Genetic, RNA, Ribosomal, 16S genetics, Thienamycins pharmacology, Bacterial Proteins, Bacteroides fragilis genetics, beta-Lactamases genetics
- Abstract
Ninety-three Bacteroides fragilis strains of different origin were analysed by multilocus enzyme electrophoresis (MLEE). Fourteen of the 15 genetic loci analysed were polymorphic, whilst nucleoside phosphorylase was monomorphic. There was a mean of six alleles per locus and a mean genetic diversity of 0.393. Cluster analysis identified 90 electrophoretic types (ETs) separated into two major phylogenetic divisions at a genetic distance of 0.70. Division I consisted of 81 ETs carrying the endogenous class A beta-lactamase gene cepA, whereas division II comprised 9 ETs carrying the class B beta-lactamase gene cfiA, but not cepA. The presence of these two genes was assessed by PCR and the expression of the cfiA gene was investigated by determining the level of resistance to the antibiotic imipenem. MLEE showed a smaller genetic distance among the genotypes of the imipenem-resistant than among the imipenem-susceptible strains. No other particular cluster was observed. The enterotoxin gene (bft) was detected by PCR: DNA sequencing of the products obtained showed that the different bft alleles (bft-1, bft-2 and bft-3) were scattered randomly troughout the phylogenetic tree. No association between distinct clones and clinical manifestations (sepsis, abscesses, diarrhoea), geographical origin or host origin (human or animal) could be found.
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- 2000
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43. Eradication of Borrelia burgdorferi infection in primary marginal zone B-cell lymphoma of the skin.
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Roggero E, Zucca E, Mainetti C, Bertoni F, Valsangiacomo C, Pedrinis E, Borisch B, Piffaretti JC, Cavalli F, and Isaacson PG
- Subjects
- Aged, Anti-Bacterial Agents therapeutic use, Borrelia burgdorferi Group genetics, DNA, Bacterial analysis, Humans, Immunoglobulin Heavy Chains genetics, Lymphoma, B-Cell pathology, Male, Polymerase Chain Reaction, Sequence Analysis, DNA, Skin Neoplasms pathology, Lyme Disease drug therapy, Lymphoma, B-Cell microbiology, Skin Neoplasms microbiology
- Abstract
Primary cutaneous B-cell lymphomas have been associated with Borrelia burgdorferi, the spirochete responsible for Lyme disease. Recently, cutaneous marginal zone B-cell lymphoma has been proposed as a distinct clinical-pathological entity. We report a case of primary cutaneous marginal zone lymphoma, associated with B burgdorferi infection. Polymerase chain reaction (PCR) amplification of the third complementarity determining region (CDR3) of the immunoglobulin heavy chain gene showed the presence of a monoclonal lymphoproliferation, therefore strengthening the histological diagnosis of a malignant process. B burgdorfer-specific hbb gene sequences were detected by PCR in the lymphoma tissue at diagnosis but not after antibiotic treatment. A nearly complete clinical and histological regression was observed after B burgdorferi eradication, with immunohistochemistry studies showing disappearance of plasma cell differentiation and a marked decline in the number of CD3+ T cells and Ki-67+ cells. Our case confirms the link between B burgdorferi and some cutaneous lymphomas. The disappearance of the microorganism accompanied by the unequivocal decrease of most indicators of active T- and B-cell immune response strongly supported a pathogenetic role for B burgdorferi in sustaining an antigen-driven development and growth of this cutaneous marginal zone lymphoma. Antibiotic therapy (analogous to Helicobacter pylori infection in gastric MALT lymphoma) might be helpful with the aim of averting or at least deferring the indication for more aggressive treatment.
- Published
- 2000
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44. Prevalence of Helicobacter pylori and hepatitis C virus infections among non-Hodgkin's lymphoma patients in Southern Switzerland.
- Author
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Zucca E, Roggero E, Maggi-Solcà N, Conconi A, Bertoni F, Reilly I, Castelli D, Pedrinis E, Piffaretti JC, and Cavalli F
- Subjects
- Aged, Female, Helicobacter Infections epidemiology, Hepatitis C epidemiology, Humans, Lymphoma, Non-Hodgkin complications, Lymphoma, Non-Hodgkin epidemiology, Male, Middle Aged, Prevalence, Switzerland, Helicobacter Infections complications, Helicobacter pylori isolation & purification, Hepacivirus isolation & purification, Hepatitis C complications, Lymphoma, Non-Hodgkin microbiology, Lymphoma, Non-Hodgkin virology
- Abstract
Background and Objective: Several recent studies have reported a high rate of previous hepatitis C virus (HCV) infection in patients with non-Hodgkin's lymphoma (NHL). However, it appears that there are marked geographical differences in the prevalence of HCV among NHL patients. There is further controversy concerning a possible pathogenetic link between HCV and certain histologic lymphoma subtypes, in particular MALT lymphomas, and it has recently been speculated that HCV might be involved in the multistep process of gastric lymphoma genesis, in addition to the well established role of chronic Helicobacter pylori infection. The aim of this study was to investigate the prevalence of HCV and H. pylori infections in patients with B-cell NHL in Southern Switzerland., Design and Methods: One hundred and eighty newly diagnosed HIV-negative B-cell NHL patients, consecutively seen at a referral oncology center in Southern Switzerland between 1990 and 1995 were prospectively studied. A microparticle enzyme immunoassay was used to detect antibodies to HCV. Serologic determination of HCV genotype was done by the Murex method. The quantitative detection of IgG anti-H. pylori was performed by the Biorad GAP test., Results: Infection with HCV was detected in 17/180 patients (9.4%; 95% C.I., 6%-15%). This prevalence is significantly higher than that observed in a large survey of 5424 new blood donors from the same area tested in 1992-97 (0.9%; 95% C.I., 0.7-1.2). Neither histologic subtypes nor specific extranodal presentations of NHL were associated with a higher prevalence of HCV. HCV serotype 2 (corresponding to genotypes 2a-c) was the most common. HCV infection was significantly associated with a shorter progression-free survival at both univariate and multivariate analysis. Anti-Helicobacter antibodies were detected in 81/180 patients (45%; 95% C.I., 38%-53%) and H. pylori infection was significantly associated with the development of primary lymphomas of the stomach., Interpretation and Conclusions: A high prevalence of HCV infection was detected in NHL lymphoma patients and was associated with a shorter time to lymphoma progression. HCV infection was not correlated with primary gastric presentation or with MALT-type histology. Our findings further support the key role of H.pylori infection in the pathogenesis of primary gastric lymphoma of MALT-type. The possible role of HCV in the pathogenesis of NHL should be further investigated.
- Published
- 2000
45. Phylogenetic relationships among muscoidea (Diptera: calyptratae) based on mitochondrial DNA sequences.
- Author
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Bernasconi MV, Valsangiacomo C, Piffaretti JC, and Ward PI
- Subjects
- Aedes classification, Aedes genetics, Animals, Anopheles classification, Anopheles genetics, Base Sequence, Diptera classification, Drosophila classification, Drosophila genetics, Molecular Sequence Data, Phylogeny, DNA, Mitochondrial chemistry, Diptera genetics
- Abstract
The utility of a mitochondrial DNA (mtDNA) fragment of about 1100 bp (including partial COI and COII sequences and tRNALeu) for evolutionary studies in Muscoidea is discussed. The species investigated are Scathophaga stercoraria, Microprosopa pallidicauda and Trichopalpus fraterna (family Scathophagidae), Musca domestica (Muscidae), Lasiomma seminitidum (Anthomyiidae) and Fannia armata (Fanniidae). Comparisons were made with published mtDNA sequences of Drosophila, Anopheles and three Calliphoridae species. The molecular phylogeny obtained here matches the classical morphological taxonomy reasonably well. This varies considerably, however, at different taxonomical levels. At a high taxonomic level, there is a clear separation between the Nematocera and the Brachycera, but the Calyptratae-Acalyptratae division is not always supported. At a lower taxonomic level, all species belonging to the same family are well grouped, but at an intermediate level, within the Calyptratae, it is impossible to clearly separate the Muscoidea and Calliphoridae, preventing a firm conclusion on the phylogenetic relationships among Muscoidea families. The entire COI sequence of S. stercoraria, as well as other mtDNA sequences (including the proximal portions of the COI gene, tRNATrp, tRNACys and tRNATyr genes) in Muscoidea species, are also presented and discussed.
- Published
- 2000
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46. Are nelfinavir-containing regimens effective as second-line triple therapy?
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Bernasconi E, Magenta L, Piffaretti JC, Carota A, and Moccetti T
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- Dideoxynucleosides therapeutic use, Drug Therapy, Combination, Humans, Lamivudine therapeutic use, Nevirapine therapeutic use, Retrospective Studies, Stavudine therapeutic use, HIV Infections drug therapy, HIV Protease Inhibitors therapeutic use, HIV-1, Nelfinavir therapeutic use, Reverse Transcriptase Inhibitors therapeutic use
- Published
- 2000
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47. Prevalence of Helicobacter pylori resistant strains in the southern part of Switzerland.
- Author
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Maggi-Solcà N, Valsangiacomo C, and Piffaretti JC
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Amoxicillin pharmacology, Clarithromycin pharmacology, Drug Resistance, Microbial, Drug Resistance, Multiple, Drug Therapy, Combination, Female, Helicobacter Infections drug therapy, Helicobacter Infections microbiology, Humans, Male, Metronidazole pharmacology, Microbial Sensitivity Tests, Middle Aged, Penicillins pharmacology, Prevalence, Switzerland epidemiology, Anti-Bacterial Agents pharmacology, Helicobacter Infections epidemiology, Helicobacter pylori drug effects
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- 2000
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48. High frequency of non-B subtypes in newly diagnosed HIV-1 infections in Switzerland.
- Author
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Böni J, Pyra H, Gebhardt M, Perrin L, Bürgisser P, Matter L, Fierz W, Erb P, Piffaretti JC, Minder E, Grob P, Burckhardt JJ, Zwahlen M, and Schüpbach J
- Subjects
- Adult, Female, Gene Products, env analysis, HIV Infections epidemiology, Heterosexuality, Homosexuality, Humans, Male, Prevalence, Risk Factors, Substance Abuse, Intravenous complications, Switzerland epidemiology, HIV Infections virology, HIV-1 classification
- Abstract
HIV-1 subtypes were determined in newly diagnosed residents of Switzerland. Blood was anonymously collected from patients with a first confirmed positive HIV-1 test result. Viral DNA from the env V3-V5 region was amplified by nested polymerase chain reaction (PCR) and screened for subtype B by heteroduplex mobility assay. All amplicons not identified as B were sequenced. From November 1996 to February 1998, 206 samples were analyzed. Main transmission risks were unprotected heterosexual (55.7%) or homosexual (27.1%) sexual contact or intravenous drug use (12.9%). Subtype B dominated in patients of Swiss, other European, American, or Asian citizenship; particularly high frequencies were found in homosexuals (97%) and drug users (94%). Non-B subtypes including A, C, D, E, F, G, H, a possible B/F recombinant, and a sequence related to J were present in 28.2% (95% confidence interval [CI], 22.9%-35.0%). Non-B were frequent in African citizens (95%), heterosexually infected individuals (44%), and women (43%). Heterosexually infected Swiss males harbored non-B strains in 18% and females in 33%. The results document a change in the epidemiology of newly diagnosed HIV-1 infections in Switzerland: predominance of heterosexual transmission and a high frequency of non-B subtypes.
- Published
- 1999
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49. Arguments against the involvement of Borrelia burgdorferi sensu lato in Alzheimer's disease.
- Author
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Gutacker M, Valsangiacomo C, Balmelli T, Bernasconi MV, Bouras C, and Piffaretti JC
- Subjects
- Aged, Aged, 80 and over, Alzheimer Disease microbiology, Borrelia burgdorferi Group isolation & purification, DNA, Ribosomal isolation & purification, DNA-Binding Proteins isolation & purification, Flagellin isolation & purification, Humans, Polymerase Chain Reaction, Alzheimer Disease etiology, Bacterial Proteins, Lyme Disease complications
- Abstract
The involvement of spirochaetes, such as the aetiologic agent of Lyme borreliosis, Borrelia burgdorferi sensu lato, in Alzheimer's disease (AD), a common neuropathology, has been proposed by several groups in the past. In our laboratory, brains from 10 AD patients were analysed for the presence of B. burgdorferi sensu lato by both standard and nested PCR techniques based on various target regions, such as the hbb gene (encoding the histone-like protein HBb), the fla gene (flagellin), the rrl-rrf ribosomal intergenic spacer region and the rrs gene (encoding 16S rRNA). In addition, ELISA and Western blot tests for the detection of antibodies against spirochaetal antigens were performed on 27 sera from clinical AD patients. Using these methods, we did not obtain any evidence of the involvement of B. burgdorferi in Alzheimer's disease.
- Published
- 1998
- Full Text
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50. Tick zoonoses in the southern part of Switzerland (Canton Ticino): occurrence of Borrelia burgdorferi sensu lato and Rickettsia sp.
- Author
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Bernasconi MV, Valsangiacomo C, Balmelli T, Péter O, and Piffaretti JC
- Subjects
- Animals, Base Sequence, Borrelia burgdorferi Group classification, Borrelia burgdorferi Group genetics, Cats parasitology, Cattle parasitology, Dogs parasitology, Humans, Ixodes microbiology, Molecular Sequence Data, Polymerase Chain Reaction, Switzerland epidemiology, Borrelia burgdorferi Group isolation & purification, Lyme Disease epidemiology, Rickettsia isolation & purification, Rickettsia Infections epidemiology, Ticks microbiology, Zoonoses epidemiology
- Abstract
The diversity and the distribution of tick species and their infection rates by the pathogenic micro-organism Borrelia burgdorferi sensu lato, the etiologic agent of Lyme borreliosis, and Rickettsia sp., were studied in Canton Ticino (the southern part of Switzerland). Ticks specimens collected from animals and humans were classified and analysed for the presence of both pathogens. In particular, PCR analysis was performed for the detection of Borrelia spirochetes in Ixodes ricinus and Ixodes hexagonus, and the hemolymph test was done on Rhipicephalus sanguineus for the detection of Rickettsia sp. PCR assays, performed on 424 of the 989 collected ticks, revealed a low rate of infection (around 2%) of both vectors I. ricinus and I. hexagonus by B. burgdorferi sensu lato. These results are in agreement with the modest number of Lyme borreliosis cases yearly recorded in Ticino. Further, through analysis of DNA sequences, the strains carried by the infected ticks were identified as belonging to the genomic group VS116. The widespread finding of the Mediterranean species Rhipicephalus sanguineus in different locations from July 1994 to October 1995 demonstrates its establishment in Ticino. Of the 210 specimens collected, 70 were analysed and one was infected by Rickettsia sp.
- Published
- 1997
- Full Text
- View/download PDF
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