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5. Vectorial role of some dermanyssoid mites (Acari, Mesostigmata, Dermanyssoidea)

Author

Valiente Moro C., Chauve C., and Zenner L.

Subjects
Dermanyssoidea, vector, bacteria, virus, parasite, Infectious and parasitic diseases, RC109-216
Abstract

Among transmissible diseases, vectorial diseases represent a major problem for public health. In the group of acarina, while ticks are the most commonly implicated vectors, other arthropods and notably Dermanyssoidea are also involved in the transmission of pathogenic agents. Since the role of this superfamily is at present largely unknown, we have reviewed the vectorial role of these mites in the appearance, survival and propagation of pathogens. Various authors have shown that Dermanyssoidea are implicated in the transmission of both bacteria (Salmonella, Spirocheta, Rickettsia or Pasteurella) and viruses (equine encephalitis viruses, West Nile virus, Fowl pox virus, the virus causing Newcastle disease and tick borne encephalitis viruses or hantaviruses). Finally, some authors have also shown their role in the transmission of some protozoa and filaria. As the vectorial character of such mites has been more clearly demonstrated (Dermanyssus gallinae, Ornithonyssus bacoti and Allodermanyssus sanguineus), it would be interesting to continue studies to better understand the role of this superfamily in the epidemiology of certain zoonoses.

Published
2005
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6. In vitro effect of essential oils from Cinnamomum aromaticum, Citrus limon and Allium sativum on two intestinal flagellates of poultry, Tetratrichomonas gallinarum and Histomonas meleagridis

Author

Zenner L., Callait M.P., Granier C., and Chauve C.

Subjects
essential oils, Cinnamomum aromaticum, Citrus limon, Allium sativum, T. gallinarum, H. meleagridis, Infectious and parasitic diseases, RC109-216
Abstract

Essential oils may be effective preventive or curative treatments against several flagelated poultry parasites and may become primordial either to organic farms, or as more drugs are bannished. The anti-flagellate activity of essential oils obtained from fresh leaves of Cinnamomum aromaticum, Citrus limon pericarps and Allium sativum bulbs was investigated in vitro on Tetratrichomonas gallinarum and Histomonas meleagridis. On T. gallinarum, the minimal lethal concentration (MLC) at 24 hours was 0.25 μl/ml for C. aromaticum oil, and 0.125 μl/ml for C. limon and A. sativum oils. On H. meleagridis, MLC was 0.5 μl/ml for C. aromaticum oil and 1 μl/m l for C. limon and A. sativum oils at 24 and 48 hours. Moreover, no synergistic effects were evidenced in vitro. The essential oil constituents, based on their GC retention times have been also identified. The major component is trans-cinnamaldehyde (79 %) for C. aromaticum; limonene for C. limon (71 %) and diallyl tri- and disulfide (79 %) for A. sativum. Even if concentration and protocol adaptations are required for successful in vivo treatments, it appears that these oils may be useful as chemotherapeutic agents against several poultry parasites.

Published
2003
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10. An Exact Enumeration of Distance-Hereditary Graphs

Author

Chauve, C��dric, Fusy, ��ric, and Lumbroso, J��r��mie

Subjects
FOS: Computer and information sciences, Discrete Mathematics (cs.DM), FOS: Mathematics, Combinatorics (math.CO), MathematicsofComputing_DISCRETEMATHEMATICS
Abstract

Distance-hereditary graphs form an important class of graphs, from the theoretical point of view, due to the fact that they are the totally decomposable graphs for the split-decomposition. The previous best enumerative result for these graphs is from Nakano et al. (J. Comp. Sci. Tech., 2007), who have proven that the number of distance-hereditary graphs on $n$ vertices is bounded by ${2^{\lceil 3.59n\rceil}}$. In this paper, using classical tools of enumerative combinatorics, we improve on this result by providing an exact enumeration of distance-hereditary graphs, which allows to show that the number of distance-hereditary graphs on $n$ vertices is tightly bounded by ${(7.24975\ldots)^n}$---opening the perspective such graphs could be encoded on $3n$ bits. We also provide the exact enumeration and asymptotics of an important subclass, the 3-leaf power graphs. Our work illustrates the power of revisiting graph decomposition results through the framework of analytic combinatorics., 14 pages, 4 figures, and a Maple worksheet; preprint of long version of IGCT 2014 article presented as "An Enumeration of Distance-Hereditary and 3-Leaf Power Graphs."

Published
2016
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11. Highly evolvable malaria vectors: The genomes of 16 Anopheles mosquitoes

Author

Neafsey, DE, Waterhouse, RM, Abai, MR, Aganezov, SS, Alekseyev, MA, Allen, JE, Amon, J, Arcà, B, Arensburger, P, Artemov, G, Assour, LA, Basseri, H, Berlin, A, Birren, BW, Blandin, SA, Brockman, AI, Burkot, TR, Burt, A, Chan, CS, Chauve, C, Chiu, JC, Christensen, M, Costantini, C, Davidson, VLM, Deligianni, E, Dottorini, T, Dritsou, V, Gabriel, SB, Guelbeogo, WM, Hall, AB, Han, MV, Hlaing, T, Hughes, DST, Jenkins, AM, Jiang, X, Jungreis, I, Kakani, EG, Kamali, M, Kemppainen, P, Kennedy, RC, Kirmitzoglou, IK, Koekemoer, LL, Laban, N, Langridge, N, Lawniczak, MKN, Lirakis, M, Lobo, NF, Lowy, E, MacCallum, RM, Mao, C, Maslen, G, Mbogo, C, McCarthy, J, Michel, K, Mitchell, SN, Moore, W, Murphy, KA, Naumenko, AN, Nolan, T, Novoa, EM, O'Loughlin, S, Oringanje, C, Oshaghi, MA, Pakpour, N, Papathanos, PA, Peery, AN, Povelones, M, Prakash, A, Price, DP, Rajaraman, A, Reimer, LJ, Rinker, DC, Rokas, A, Russell, TL, Sagnon, N, Sharakhova, MV, Shea, T, Simão, FA, Simard, F, Slotman, MA, Somboon, P, Stegniy, V, Struchiner, CJ, and Thomas, GWC

Abstract

© 2015, american association for the advancement of science. All rigths reserved. Variation in vectorial capacity for human malaria among Anopheles mosquito species is determined by many factors, including behavior, immunity, and life history. To investigate the genomic basis of vectorial capacity and explore new avenues for vector control, we sequenced the genomes of 16 anopheline mosquito species from diverse locations spanning ∼100 million years of evolution. Comparative analyses show faster rates of gene gain and loss, elevated gene shuffling on the X chromosome, and more intron losses, relative to Drosophila. Some determinants of vectorial capacity, such as chemosensory genes, do not show elevated turnover but instead diversify through protein-sequence changes. This dynamism of anopheline genes and genomes may contribute to their flexible capacity to take advantage of new ecological niches, including adapting to humans as primary hosts.

Published
2015

12. Mosquito genomics. Highly evolvable malaria vectors: the genomes of 16 Anopheles mosquitoes

Author

Neafsey, D. E., Waterhouse, R. M., Abai, M. R., Aganezov, S. S., Alekseyev, M. A., Allen, J. E., Amon, J., Arca, B., Arensburger, P., Artemov, G., Assour, L. A., Basseri, H., Berlin, A., Birren, B. W., Blandin, S. A., Brockman, A. I., Burkot, T. R., Burt, A., Chan, C. S., Chauve, C., Chiu, J. C., Christensen, M., Costantini, C., Davidson, V. L., Deligianni, E., Dottorini, T., Dritsou, V., Gabriel, S. B., Guelbeogo, W. M., Hall, A. B., Han, M. V., Hlaing, T., Hughes, D. S., Jenkins, A. M., Jiang, X., Jungreis, I., Kakani, E. G., Kamali, M., Kemppainen, P., Kennedy, R. C., Kirmitzoglou, I. K., Koekemoer, L. L., Laban, N., Langridge, N., Lawniczak, M. K., Lirakis, M., Lobo, N. F., Lowy, E., MacCallum, R. M., Mao, C., Maslen, G., Mbogo, C., McCarthy, J., Michel, K., Mitchell, S. N., Moore, W., Murphy, K. A., Naumenko, A. N., Nolan, T., Novoa, E. M., O'Loughlin, S., Oringanje, C., Oshaghi, M. A., Pakpour, N., Papathanos, P. A., Peery, A. N., Povelones, M., Prakash, A., Price, D. P., Rajaraman, A., Reimer, L. J., Rinker, D. C., Rokas, A., Russell, T. L., Sagnon, N., Sharakhova, M. V., Shea, T., Simao, F. A., Simard, F., Slotman, M. A., Somboon, P., Stegniy, V., Struchiner, C. J., Thomas, G. W., Tojo Castro, Marta, Topalis, P., Tubio, J. M., Unger, M. F., Vontas, J., Walton, C., Wilding, C. S., Willis, J. H., Wu, Y. C., Yan, G., Zdobnov, E. M., Zhou, X., Catteruccia, F., Christophides, G. K., Collins, F. H., Cornman, R. S., Crisanti, A., Donnelly, M. J., Emrich, S. J., Fontaine, M. C., Gelbart, W., Hahn, M. W., Hansen, I. A., Howell, P. I., Kafatos, F. C., Kellis, M., Lawson, D., Louis, C., Luckhart, S., Muskavitch, M. A., Ribeiro, J. M., Riehle, M. A., Sharakhov, I. V., Tu, Z., Zwiebel, L. J., and Besansky, N. J.

Subjects
EXPRESSION, SEX-CHROMOSOME EVOLUTION, ANTENNAL TRANSCRIPTOME PROFILES, Base Sequence, R CONSENSUS, Genome, Insect, Molecular Sequence Data, GAMBIAE, CUTICULAR PROTEIN GENES, AEDES-AEGYPTI, DROSOPHILA, ANNOTATION, FAMILY, Malari, Chromosomes, Insect, Insect Vectors, Evolution, Molecular, Anopheles, Animals, Humans, Drosophila, Sequence Alignment, Phylogeny
Abstract

Variation in vectorial capacity for human malaria among Anopheles mosquito species is determined by many factors, including behavior, immunity, and life history. To investigate the genomic basis of vectorial capacity and explore new avenues for vector control, we sequenced the genomes of 16 anopheline mosquito species from diverse locations spanning ~100 million years of evolution. Comparative analyses show faster rates of gene gain and loss, elevated gene shuffling on the X chromosome, and more intron losses, relative to Drosophila. Some determinants of vectorial capacity, such as chemosensory genes, do not show elevated turnover but instead diversify through protein-sequence changes. This dynamism of anopheline genes and genomes may contribute to their flexible capacity to take advantage of new ecological niches, including adapting to humans as primary hosts.

Published
2015

13. Separation of Cellulose Nanocrystals

Author

Chauve, C., Fraschini, C., Jean, B., Carret, Michèle, inconnu, Inconnu, Centre de Recherches sur les Macromolécules Végétales (CERMAV), and Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)

Subjects
02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 0210 nano-technology, 01 natural sciences, 0104 chemical sciences
Published
2014

14. Linearization of ancestral multichromosomal genomes

Author

Manuch, J., Patterson, Murray, Wittler, R., Chauve, C., Tannier, E., Hurink, Johann, and Manthey, B.

Subjects
computational complexity, graph matching algorithms, ancestral genome reconstruction
Published
2013

15. Monitoring of \textitDermanyssus gallinae in free-range poultry farms

Author

Zenner, Lionel, Bon, G., Chauve, C., Nemoz, C., Lubac, S., Génétique et évolution des interactions hôtes-parasites, Département génétique, interactions et évolution des génomes [LBBE] (GINSENG), Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDV]Life Sciences [q-bio]
Published
2009

16. Prédiction de synténies dans le génome ancestral des amniotes

Author

Boyer, F., Chauve, C., Tannier, Eric, Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS), Bioinformatique, phylogénie et génomique évolutive (BPGE), Département PEGASE [LBBE] (PEGASE), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), and Jacques van Helden, Yves Moreau

Subjects
[SDV.OT]Life Sciences [q-bio]/Other [q-bio.OT]
Published
2008

17. Benchmarking RNA secondary structure comparison algorithms

Author

Allali, J., D'Aubenton-Carafa, Y., Chauve, C., Denise, A., Drevet, C., Ferraro, P., Gautheret, D., Herrbach, C., Leclerc F, F., De Monte, A., Ouangraoua, A., Sagot, M.-F., Saule, C., Termier, M., Thermes C, C., Touzet, H., Centre de génétique moléculaire (CGM), Centre National de la Recherche Scientifique (CNRS), Institut de génétique et microbiologie [Orsay] (IGM), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Centre Hospitalier de Montreal, Hôtel-Dieu-Université de Montréal (UdeM)-Centre Hospitalier de l'Université de Montréal (CHUM), Université de Montréal (UdeM), Laboratoire Bordelais de Recherche en Informatique (LaBRI), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB), SFU Discrete Mathematics Group (SFU-DMG), Simon Fraser University (SFU.ca), Laboratoire de Recherche en Informatique (LRI), Université Paris-Sud - Paris 11 (UP11)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Pacific Institute for the Mathematical Sciences (PIMS), University of Calgary, Technologies avancées pour le génôme et la clinique (TAGC), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Maturation des ARN et enzymologie moléculaire (MAEM), Cancéropôle du Grand Est-Université Henri Poincaré - Nancy 1 (UHP)-IFR111-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Informatique Fondamentale de Lille (LIFL), Université de Lille, Sciences et Technologies-Institut National de Recherche en Informatique et en Automatique (Inria)-Université de Lille, Sciences Humaines et Sociales-Centre National de la Recherche Scientifique (CNRS), Computer science and genomics (HELIX), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS), Sequential Learning (SEQUOIA), Université de Lille, Sciences et Technologies-Institut National de Recherche en Informatique et en Automatique (Inria)-Université de Lille, Sciences Humaines et Sociales-Centre National de la Recherche Scientifique (CNRS)-Université de Lille, Sciences et Technologies-Institut National de Recherche en Informatique et en Automatique (Inria)-Université de Lille, Sciences Humaines et Sociales-Centre National de la Recherche Scientifique (CNRS)-Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria), ANR-06-BLAN-0045,BRASERO,Biologically Relevant Algorithms and Softwares for Efficient RNA Structure Comparison(2006), Université de Bordeaux (UB)-École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB)-Centre National de la Recherche Scientifique (CNRS), University of Calgary-Centre National de la Recherche Scientifique (CNRS), and Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, [INFO.INFO-BI]Computer Science [cs]/Bioinformatics [q-bio.QM], [SDV.BIBS]Life Sciences [q-bio]/Quantitative Methods [q-bio.QM]
Abstract

International audience; In the last ten years, several tools have been proposed for RNA secondary structure pairwise comparison. These tools use different models (ordered tree or forest, arc annotated sequence, multi-level tree) and methods (edit distance, alignment). We present a first benchmark for comparing these tools. For various RNA families, we built two sets of secondary structures. The first, called the reference set, is composed of a small number of RNAs with their known structures. The second is composed of sequences folded using Mfold and RNAshapes. Some of these sequences correspond to structural RNAs of the same families (true events), other correspond to noise. We studied the ability of each tool to find the true events using the reference set. In particular we analysed the results in terms of sensibility/specificity, distribution and spread of the scores, and computation time.

Published
2008

18. Experimental infection of Salmonella Enteritidis by the poultry red mite Dermanyssus gallinae

Author

Valiente Moro, C., Chauve, C., Zenner, L., Génétique et évolution des interactions hôtes-parasites, Département génétique, interactions et évolution des génomes [LBBE] (GINSENG), Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDV.OT]Life Sciences [q-bio]/Other [q-bio.OT]
Published
2007

19. Incidence of histomonosis in Turkeys in france since the bas of dimetridazole and nifursol

Author

Callait-Cardinal, M-P., Leroux, S., Venereau, E., Chauve, C., Le Pottier, G., Zenner, Lionel, Génétique et évolution des interactions hôtes-parasites, Département génétique, interactions et évolution des génomes [LBBE] (GINSENG), Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDV]Life Sciences [q-bio]
Published
2007

20. La sarcosporidiose bovine

Author

Zenner, L., Callait-Cardinal, Marie-Pierre, Chauve, C., Génétique et évolution des interactions hôtes-parasites, Département génétique, interactions et évolution des génomes [LBBE] (GINSENG), Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS), ProdInra, Migration, Protozaires entéricoles des volailles, Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Vétérinaire de Lyon (ENVL), Ecole Nationale Vétérinaire de Lyon (ENVL), and Ecole Nationale Vétérinaire de Lyon (ENVL)-Institut National de la Recherche Agronomique (INRA)

Subjects
PARASITOLOGIE, [SDV] Life Sciences [q-bio], [SDV.OT]Life Sciences [q-bio]/Other [q-bio.OT], [SDV]Life Sciences [q-bio], SARCOSPORIDIOSE
Abstract

National audience; Trois espèces de protozoaires, coccidies dixènes, sarcotis bovicanis, S. bovifelis et S. Bovihominis sont responsables de la sarcosporidiose chez les bovins, hôtes intermédiaires. Les hôtes définitif sont, respectivement, le chat, le chien et l’Homme. Ce dernier donne à cette affection une importance non négligeable en santé publique. Les signes cliniques chez les bovins, rarement présents, sont toujours peu évocateurs : syndrome fébrile intermittent, avec anémie dans la forme aigüe ou myosite dans la forme chronique. Le diagnostic de routine est toujours difficile et passe par la mise en œuvre d’analyses histologiques, sérologiques ou de biologie moléculaires. Les moyens de prophylaxie collective sont, en pratique, quasi inexistants. Seule la prophylaxie individuelle, avec la cuisson à cœur et/ou la congélation permettent d’éviter la maladie chez l’Homme de façon certaine.

Published
2005

21. Histomonose : les travaux conduits à l'ENV de Lyon

Author

Sylvain, D., Chauve, C., Zenner, L., ProdInra, Migration, Protozaires entéricoles des volailles, Ecole Nationale Vétérinaire de Lyon (ENVL)-Institut National de la Recherche Agronomique (INRA), Ecole Nationale Vétérinaire de Lyon (ENVL), Génétique et évolution des interactions hôtes-parasites, Département génétique, interactions et évolution des génomes [LBBE] (GINSENG), Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDV] Life Sciences [q-bio], [SDV.OT]Life Sciences [q-bio]/Other [q-bio.OT], HISTOMONOSE, [SDV]Life Sciences [q-bio], HISTOMONAS MELEAGRIDIS
Published
2004

22. L'histomonose de la dinde une maladie d'actualité ?

Author

Zenner, L., Chaussat, L., Chauve, C., Génétique et évolution des interactions hôtes-parasites, Département génétique, interactions et évolution des génomes [LBBE] (GINSENG), Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDV.OT]Life Sciences [q-bio]/Other [q-bio.OT]
Published
2002

43. In vitroeffect of essential oils from Cinnamomum aromaticum, Citrus limonand Allium sativumon two intestinal flagellates of poultry, Tetratrichomonas gallinarumand Histomonas meleagridis

Author

Zenner, L., Callait, M.P., Granier, C., Chauve, C., Zenner, L., Callait, M.P., Granier, C., and Chauve, C.

Abstract

Essential oils may be effective preventive or curative treatments against several flagelated poultry parasites and may become primordial either to organic farms, or as more drugs are bannished. The anti-flagellate activity of essential oils obtained from fresh leaves of Cinnamomum aromaticum, Citrus limonpericarps and Allium sativumbulbs was investigated in vitroon Tetratrichomonas gallinarumand Histomonas meleagridis. On T. gallinarum, the minimal lethal concentration (MLC) at 24 hours was 0.25 μl/ml for C. aromaticumoil, and 0.125 μl/ml for C. limonand A. sativumoils. On H. meleagridis, MLC was 0.5 μl/ml for C. aromaticumoil and 1 μl/m l for C. limonand A. sativumoils at 24 and 48 hours. Moreover, no synergistic effects were evidenced in vitro.The essential oil constituents, based on their GC retention times have been also identified. The major component is trans-cinnamaldehyde (79 %) for C. aromaticum;limonene for C. limon(71 %) and diallyl tri- and disulfide (79 %) for A. sativum. Even if concentration and protocol adaptations are required for successful in vivotreatments, it appears that these oils may be useful as chemotherapeutic agents against several poultry parasites.

Published
2003
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48. Detection of Salmonella sp. in Dermanyssus gallinae using an FTA® filter-based polymerase chain reaction.

Author

MORO, C. VALIENTE, DESLOIRE, S., CHAUVE, C., and ZENNER, L.

Subjects
SALMONELLA, CHICKEN-mite, BACTERIA, POLYMERASE chain reaction, DNA polymerases, GENE amplification
Abstract

Salmonella spp. bacteria are responsible for some of the most important zoonoses worldwide. Because Dermanyssus gallinae (DeGeer) (Acari: Dermanyssidae) has been recently reported to be an experimental vector of Salmonella Enteritidis, it would be of benefit to evaluate the presence of this bacterium in mites. A molecular detection tool associating a simple filter-based DNA preparation with a specific 16S rDNA Salmonella sp. polymerase chain reaction (PCR) amplification was described. The limit of detection with this method was 2 × 104 bacteria per mite. To adapt this technique for large-scale studies, two sizes of mite pools were tested and a preliminary investigation was carried out on mites from 16 currently or previously contaminated farms. Mites sampled from one farm of each type were positive for Salmonella, suggesting that Dermanyssus could act as a reservoir between flocks. In further investigations, it will be necessary to carry out a large-scale study to assess the role of D. gallinae in the epidemiology of avian salmonellosis. [ABSTRACT FROM AUTHOR]

Published
2007
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49. Comparison of the VIDAS® system, FTA® filter-based PCR and culture on SM ID for detecting Salmonella in Dermanyssus gallinae.

Author

Moro, C. Valiente, Desloire, S., Vernozy-Rozand, C., Chauve, C., and Zenner, L.

Subjects
SALMONELLA, CHICKEN-mite, IMMUNOASSAY, PATHOGENIC microorganisms, PATHOGENIC bacteria, POULTRY housing
Abstract

Aims: To compare different analytical methods for detecting Salmonella in Dermanyssus gallinae. Methods and Results: The detection limit of three Salmonella detection methods [Vitek immunodiagnostic assay (VIDAS®) Salmonella immuno-concentration/immunoassay, FTA® filter-based PCR, and Salmonella detection and identification medium (SM ID) preceded by a pre-enrichment step] was evaluated by crushing mites in serial dilutions of pure cultures of Salmonella enterica ssp. Enterica serotype Enteritidis . Each method was then compared for its ability to detect Salmonella in artificially contaminated mites. In 105 mites artificially engorged with Salm. Enteritidis-contaminated blood, Salmonella was isolated from 68 samples of the samples cultured on SM ID and tests were positive for Salmonella using FTA filter-based PCR and VIDAS in 77 and 65 samples, respectively. Using SM ID as our reference method, specificities and sensitivities were 97% and 94% and 73% and 98·5% for VIDAS and PCR, respectively. Conclusions: Each method allowed the detection of Salmonella in contaminated mites and is usable for screening mites. PCR is more sensitive but less specific than VIDAS for detecting Salmonella. Significance and Impact of the Study: This is the first time that the VIDAS has been used to detect pathogens in vectors. The development of analytical methods for Salmonella detection in mites is a necessary step in the study of the role of D. gallinae as a vector of salmonellae and to check the contamination of D. gallinae in poultry facilities. [ABSTRACT FROM AUTHOR]

Published
2007
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50. Perfect Sorting by Reversals Is Not Always Difficult.

Author

Berard, S., Bergeron, A., Chauve, C., and Paul, C.

Abstract

We propose new algorithms for computing pairwise rearrangement scenarios that conserve the combinatorial structure of genomes. More precisely, we investigate the problem of sorting signed permutations by reversals without breaking common intervals. We describe a combinatorial framework for this problem that allows us to characterize classes of signed permutations for which one can compute, in polynomial time, a shortest reversal scenario that conserves all common intervals. In particular, we define a class of permutations for which this computation can be done in linear time with a very simple algorithm that does not rely on the classical Hannenhalli-Pevzner theory for sorting by reversals. We apply these methods to the computation of rearrangement scenarios between permutations obtained from 16 synteny blocks of the X chromosomes of the human, mouse, and rat [ABSTRACT FROM PUBLISHER]

Published
2007
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