22 results on '"Mamadou Kane"'
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2. Sharing space between native and invasive small mammals: Study of commensal communities in Senegal
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Laurent Granjon, Emanuelle Artige, Khalilou Bâ, Carine Brouat, Ambroise Dalecky, Christophe Diagne, Mamoudou Diallo, Odile Fossati‐Gaschignard, Philippe Gauthier, Mamadou Kane, Laëtitia Husse, Youssoupha Niang, Sylvain Piry, Nathalie Sarr, Aliou Sow, and Jean‐Marc Duplantier
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community ecology ,co‐occurrence ,rodents ,shrews ,West Africa ,Ecology ,QH540-549.5 - Abstract
Abstract Urbanization processes are taking place at a very high rate, especially in Africa. At the same time, a number of small mammal species, be they native or invasive, take advantage of human‐induced habitat modifications. They represent commensal communities of organisms that cause a number of inconveniences to humans, including potential reservoirs of zoonotic diseases. We studied via live trapping and habitat characterization such commensal small mammal communities in small villages to large cities of Senegal, to try to understand how the species share this particular space. Seven major species were recorded, with exotic invasive house mice (Mus musculus) and black rats (Rattus rattus) dominating in numbers. The shrew Crocidura olivieri appeared as the main and more widespread native species, while native rodent species (Mastomys natalensis, M. erythroleucus, Arvicanthis niloticus and Praomys daltoni) were less abundant and/or more localized. Habitat preferences, compared between species in terms of room types and characteristics, showed differences among house mice, black rats and M. natalensis especially. Niche (habitat component) breadth and overlap were measured. Among invasive species, the house mouse showed a larger niche breadth than the black rat, and overall, all species displayed high overlap values. Co‐occurrence patterns were studied at the global and local scales. The latter show cases of aggregation (between the black rat and native species, for instance) and of segregation (as between the house mouse and the black rat in Tambacounda, or between the black rat and M. natalensis in Kédougou). While updating information on commensal small mammal distribution in Senegal, a country submitted to a dynamic process of invasion by the black rat and the house mouse, we bring original information on how species occupy and share the commensal space, and make predictions on the evolution of these communities in a period of ever‐accelerating global changes.
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- 2023
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3. Same Invasion, Different Routes: Helminth Assemblages May Favor the Invasion Success of the House Mouse in Senegal
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Christophe Diagne, Laurent Granjon, Caroline Tatard, Alexis Ribas, Arame Ndiaye, Mamadou Kane, Youssoupha Niang, and Carine Brouat
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biological invasions ,enemy release ,gastrointestinal helminths ,Mastomys erythroleucus ,Mus musculus domesticus ,spatial survey ,Veterinary medicine ,SF600-1100 - Abstract
Previous field-based studies have evidenced patterns in gastrointestinal helminth (GIH) assemblages of rodent communities that are consistent with “enemy release” and “spill-back” hypotheses, suggesting a role of parasites in the ongoing invasion success of the exotic house mouse (Mus musculus domesticus) in Senegal (West Africa). However, these findings came from a single invasion route, thus preventing to ascertain that they did not result from stochastic and/or selective processes that could differ across invasion pathways. In the present study, we investigated the distribution of rodent communities and their GIH assemblages in three distinct zones of Northern Senegal, which corresponded to independent house mouse invasion fronts. Our findings first showed an unexpectedly rapid spread of the house mouse, which reached even remote areas where native species would have been expected to dominate the rodent communities. They also strengthened previous insights suggesting a role of helminths in the invasion success of the house mouse, such as: (i) low infestation rates of invading mice by the exotic nematode Aspiculuris tetraptera at invasion fronts—except in a single zone where the establishment of the house mouse could be older than initially thought, which was consistent with the “enemy release” hypothesis; and (ii) higher infection rates by the local cestode Mathevotaenia symmetrica in native rodents with long co-existence history with invasive mice, bringing support to the “spill-back” hypothesis. Therefore, “enemy release” and “spill-back” mechanisms should be seriously considered when explaining the invasion success of the house mouse—provided further experimental works demonstrate that involved GIHs affect rodent fitness or exert selective pressures. Next steps should also include evolutionary, immunological, and behavioral perspectives to fully capture the complexity, causes and consequences of GIH variations along these invasion routes.
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- 2021
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4. How Can Intermediate Algebra Teaching and Learning Be Improved at an Urban Community College by Adopting the Instructors' Consensus Learning to Learn Strategies Developed within a Community of Practice?
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Mamadou Kane
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The low academic learning outcomes and persistence rates among students starting in developmental mathematics at community colleges are concerning. Improving the teaching and learning of developmental mathematics is imperative. This Action Research study aimed to investigate and improve developmental mathematics students' low retention rate and mediocre academic achievement at a large urban community college. Participants and data collected in Cycle 1 consisted of interviews and surveys of intermediate algebra instructors and students. Action steps, including collaboration amongst instructors, motivation for students' engagement, and corrective actions throughout the process, were designed, implemented, and evaluated in Cycle 2 to ensure intrinsic and lasting motivation to learn. Findings included resistance to change, the need to ensure administrative support, and the development of learning to learn strategies. Implications for the organization included acknowledging that financial support was needed, developing adaptive curricula, recognizing the catalysts for improvement, and setting clear achievement goals. Cycle 2 consisted of setting up a group of instructors working within a community of practice. The instructors met weekly for about two months, discussed and developed strategies for learning to learn in four specific topics of intermediate algebra, and implemented these strategies in their classes. Concurrently, students took surveys to collect learners' teaching evaluations. The research study concluded with the college report on the academic and persistence outcomes for the treatment group versus the control group. These results showed a double-digit percentage higher for the treatment group when compared to the control group. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]
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- 2024
5. Leishmania major and Trypanosoma lewisi infection in invasive and native rodents in Senegal.
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Cécile Cassan, Christophe A Diagne, Caroline Tatard, Philippe Gauthier, Ambroise Dalecky, Khalilou Bâ, Mamadou Kane, Youssoupha Niang, Mamoudou Diallo, Aliou Sow, Carine Brouat, and Anne-Laure Bañuls
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Arctic medicine. Tropical medicine ,RC955-962 ,Public aspects of medicine ,RA1-1270 - Abstract
Bioinvasion is a major public health issue because it can lead to the introduction of pathogens in new areas and favours the emergence of zoonotic diseases. Rodents are prominent invasive species, and act as reservoirs in many zoonotic infectious diseases. The aim of this study was to determine the link between the distribution and spread of two parasite taxa (Leishmania spp. and Trypanosoma lewisi) and the progressive invasion of Senegal by two commensal rodent species (the house mouse Mus musculus domesticus and the black rat Rattus rattus). M. m. domesticus and R. rattus have invaded the northern part and the central/southern part of the country, respectively. Native and invasive rodents were caught in villages and cities along the invasion gradients of both invaders, from coastal localities towards the interior of the land. Molecular diagnosis of the two trypanosomatid infections was performed using spleen specimens. In the north, neither M. m. domesticus nor the native species were carriers of these parasites. Conversely, in the south, 17.5% of R. rattus were infected by L. major and 27.8% by T. lewisi, while very few commensal native rodents were carriers. Prevalence pattern along invasion gradients, together with the knowledge on the geographical distribution of the parasites, suggested that the presence of the two parasites in R. rattus in Senegal is of different origins. Indeed, the invader R. rattus could have been locally infected by the native parasite L. major. Conversely, it could have introduced the exotic parasite T. lewisi in Senegal, the latter appearing to be poorly transmitted to native rodents. Altogether, these data show that R. rattus is a carrier of both parasites and could be responsible for the emergence of new foci of cutaneous leishmaniasis, or for the transmission of atypical human trypanosomiasis in Senegal.
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- 2018
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6. Toxoplasmosis seroprevalence in urban rodents: a survey in Niamey, Niger
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Aurelien Mercier, Madougou Garba, Henri Bonnabau, Mamadou Kane, Jean-Pierre Rossi, Marie-Laure Darde, and Gauthier Dobigny
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Toxoplasma gondii ,epidemiology ,zoonotic disease ,Africa ,Sahel ,Microbiology ,QR1-502 ,Infectious and parasitic diseases ,RC109-216 - Abstract
A serological survey of Toxoplasma gondii was conducted on 766 domestic and peridomestic rodents from 46 trapping sites throughout the city of Niamey, Niger. A low seroprevalence was found over the whole town with only 1.96% of the rodents found seropositive. However, differences between species were important, ranging from less than 2% in truly commensal Mastomys natalensis, Rattus rattus and Mus musculus, while garden-associated Arvicanthis niloticus displayed 9.1% of seropositive individuals. This is in line with previous studies on tropical rodents - that we reviewed here - which altogether show that Toxoplasma seroprevalence in rodent is highly variable, depending on many factors such as locality and/or species. Moreover, although we were not able to decipher statistically between habitat or species effect, such a contrast between Nile grass rats and the other rodent species points towards a potentially important role of environmental toxoplasmic infection. This would deserve to be further scrutinised since intra-city irrigated cultures are extending in Niamey, thus potentially increasing Toxoplasma circulation in this yet semi-arid region. As far as we are aware of, our study is one of the rare surveys of its kind performed in Sub-Saharan Africa and the first one ever conducted in the Sahel.
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- 2013
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7. Spatial segregation between invasive and native commensal rodents in an urban environment: a case study in Niamey, Niger.
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Madougou Garba, Ambroise Dalecky, Ibrahima Kadaoure, Mamadou Kane, Karmadine Hima, Sophie Veran, Sama Gagare, Philippe Gauthier, Caroline Tatard, Jean-Pierre Rossi, and Gauthier Dobigny
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Medicine ,Science - Abstract
Invasive rodents have been responsible for the diffusion worldwide of many zoonotic agents, thus representing major threats for public health. Cities are important hubs for people and goods exchange and are thus expected to play a pivotal role in invasive commensal rodent dissemination. Yet, data about urban rodents' ecology, especially invasive vs. native species interactions, are dramatically scarce. Here, we provide results of an extensive survey of urban rodents conducted in Niamey, Niger, depicting the early stages of rodent bioinvasions within a city. We explore the species-specific spatial distributions throughout the city using contrasted approaches, namely field sampling, co-occurrence analysis, occupancy modelling and indicator geostatistics. We show that (i) two species (i.e. rural-like vs. truly commensal) assemblages can be identified, and that (ii) within commensal rodents, invasive (Rattus rattus and Mus musculus) and native (Mastomys natalensis) species are spatially segregated. Moreover, several pieces of arguments tend to suggest that these exclusive distributions reflect an ongoing native-to-invasive species turn over. The underlying processes as well as the possible consequences for humans are discussed.
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- 2014
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8. Molecular Survey of Rodent-Borne Infectious Agents in the Ferlo Region, Senegal
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Joa Braïthe Mangombi-Pambou, Laurent Granjon, Fabien Flirden, Mamadou Kane, Youssoupha Niang, Bernard Davoust, Florence Fenollar, Oleg Mediannikov, Centre International de Recherches Médicales de Franceville (CIRMF), Microbes évolution phylogénie et infections (MEPHI), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Institut Hospitalier Universitaire Méditerranée Infection (IHU Marseille), Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM), BIOPASS, ISRA-UCAD, Institut de Recherche pour le Développement (IRD [France-Ouest]), Vecteurs - Infections tropicales et méditerranéennes (VITROME), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut de Recherche Biomédicale des Armées [Brétigny-sur-Orge] (IRBA), This study was supported by the Institut Hospitalo-Universitaire (IHU) Méditerranée Infection, the French National Research Agency under the Investissements d’avenir programme (reference: ANR-10-IAHU-0003) and the fourth Make Our Planet Great Again programme (MOPGA 4). This work was co-funded by the Labex DRIIHM, the French Investissements d’Avenir programme (ANR-11-LABX-0010), which is managed by the ANR., ANR-10-IAHU-0003,Méditerranée Infection,I.H.U. Méditerranée Infection(2010), and ANR-11-LABX-0010,DRIIHM / IRDHEI,Dispositif de recherche interdisciplinaire sur les Interactions Hommes-Milieux(2011)
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rodents ,infectious agents ,multiple infections ,zoonotic diseases ,tick-borne zoonotic disease ,[SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases ,Genetics ,Genetics (clinical) - Abstract
International audience; Zoonotic pathogens are responsible for most infectious diseases in humans, with rodents being important reservoir hosts for many of these microorganisms. Rodents, thus, pose a significant threat to public health. Previous studies in Senegal have shown that rodents harbour a diversity of microorganisms, including human pathogens. Our study aimed to monitor the prevalence of infectious agents in outdoor rodents, which can be the cause of epidemics. We screened 125 rodents (both native and expanding) from the Ferlo region, around Widou Thiengoly, for different microorganisms. Analysis, performed on rodent spleens, detected bacteria from the Anaplasmataceae family (20%), Borrelia spp. (10%), Bartonella spp. (24%) and Piroplasmida (2.4%). Prevalences were similar between native and the expanding (Gerbillus nigeriae) species, which has recently colonised the region. We identified Borrelia crocidurae, the agent responsible for tick-borne relapsing fever, which is endemic in Senegal. We also identified two other not-yet-described bacteria of the genera Bartonella and Ehrlichia that were previously reported in Senegalese rodents. Additionally, we found a potential new species, provisionally referred to here as Candidatus Anaplasma ferloense. This study highlights the diversity of infectious agents circulating in rodent populations and the importance of describing potential new species and evaluating their pathogenicity and zoonotic potential.
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- 2023
9. Genetic mechanism, baseline sensitivity and risk of resistance to oxathiapiprolin in oomycetes.
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Mboup, Mamadou Kane, Sweigard, James W, Carroll, Anne, Jaworska, Grazyna, and Genet, Jean‐Luc
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PHYTOPHTHORA capsici ,LATE blight of potato ,OOMYCETES ,PHYTOPHTHORA infestans ,DOWNY mildew diseases ,FUNGICIDE resistance - Abstract
BACKGROUND Oxathiapiprolin is a piperidinyl thiazole isoxazoline fungicide discovered by DuPont and commercialized by Corteva Agriscience. It acts by inhibiting a novel fungal target, an oxysterol binding protein (OSBP), and is intrinsically highly active against oomycetes including grape downy mildew (Plasmopara viticola) and potato late blight (Phytophthora infestans). Because the fungicide acts at a single site there is a need to determine the risk of resistance development. RESULTS: Oxathiapiprolin controlled European Plasmopara viticola and Phytophthora infestans isolates at very low concentrations with half maximal effective concentration (EC50) values ranging from 0.001 to 0.0264 mg L−1 and 0.001 to 0.03 mg L−1, respectively. Laboratory mutagenesis studies performed with Phytophthora capsici using ultraviolet (UV) irradiation generated mutants with reduced sensitivity to oxathiapiprolin. All resistant mutants had a base pair change in the OSBP gene that resulted in an amino acid change. Most common substitutions were S768Y, G770V, G839W and L863W. Isolates of Plasmopara viticola and Phytophthora infestans with reduced sensitivity were also detected in field trial sites where oxathiapiprolin had been applied repeatedly each season over several consecutive years. CONCLUSIONS: The risk of oxathiapiprolin resistance development in Plasmopara viticola and Phytophthora infestans is medium to high and strict resistance management measures are required. Over‐exposure of target populations to single‐site fungicides during product development should be avoided. [ABSTRACT FROM AUTHOR]
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- 2022
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10. Seroprevalence of Toxoplasma gondii in commensal rodents sampled across Senegal, West Africa
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Christophe Diagne, Sylvain Piry, Abdelkrim Aroussi, Lokman Galal, Aliou Sow, Mamadou Kane, Mamoudou Diallo, Marie-Laure Dardé, Youssoupha Niang, Aurélien Mercier, Carine Brouat, Khalilou Bâ, Khadija Ismaïl, Ambroise Dalecky, Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), Neuroépidémiologie Tropicale (NET), CHU Limoges-Institut d'Epidémiologie Neurologique et de Neurologie Tropicale-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST), Université de Limoges (UNILIM)-Université de Limoges (UNILIM), Laboratoire Population-Environnement-Développement (LPED), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU), Institut de Recherche pour le Developpement (IRD), ANR ENEMI : ANR-11-JSV7-0006, Institut Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-CHU Limoges-Institut d'Epidémiologie Neurologique et de Neurologie Tropicale-Institut National de la Santé et de la Recherche Médicale (INSERM), and Galal, Lokman
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0301 basic medicine ,Male ,Rodent ,Antibodies, Protozoan ,West africa ,Rodent Diseases ,0302 clinical medicine ,Seroepidemiologic Studies ,Direct agglutination test ,Mastomys erythroleucus ,ComputingMilieux_MISCELLANEOUS ,2. Zero hunger ,[SDV.EE]Life Sciences [q-bio]/Ecology, environment ,biology ,seroprevalence ,Senegal ,[SDV.EE] Life Sciences [q-bio]/Ecology, environment ,Africa, Western ,Africa ,rodents ,Toxoplasma gondii ,Infectious Diseases ,Female ,Toxoplasma ,Research Article ,risque infectieux ,Veterinary (miscellaneous) ,030231 tropical medicine ,Zoology ,lcsh:Infectious and parasitic diseases ,03 medical and health sciences ,biology.animal ,Agglutination Tests ,parasitic diseases ,Seroprevalence ,Animals ,Humans ,lcsh:RC109-216 ,Symbiosis ,rongeur ,afrique de l'ouest ,sénégal ,biology.organism_classification ,030104 developmental biology ,Toxoplasmosis, Animal ,[SDV.SPEE] Life Sciences [q-bio]/Santé publique et épidémiologie ,Insect Science ,Mastomys ,Animal Science and Zoology ,Parasitology ,[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie ,Murinae - Abstract
Risks related to Toxoplasma gondii infection in humans remain poorly known in Senegal. Although rodent surveys could help to assess the circulation of T. gondii, they have seldom been set up in sub-Saharan Africa. The aim of this study was to examine Toxoplasma seroprevalence in rodents from villages and towns across Senegal. Rodents were sampled in 40 localities using a standardised trapping protocol. Detection of T. gondii antibodies was performed on 1205 rodents, using a modified agglutination test (MAT) technique. Seroprevalence data were analysed depending on geography, the local rodent community, and individual characteristics of the rodent hosts. We found 44 seropositive rodents from four different species (Mastomys erythroleucus, Mastomys natalensis, Mus musculus domesticus, Rattus rattus). Toxoplasma seroprevalence was low, averaging 4% in the localities. Higher Toxoplasma seroprevalence (up to 24%) was found in northern Senegal, a region known to be the heart of pastoral herding in the country., Séroprévalence de Toxoplasma gondii chez les rongeurs commensaux au Sénégal, Afrique de l’Ouest. Les risques liés à l’infection par Toxoplasma gondii chez l’homme restent mal connus au Sénégal. Bien que les rongeurs soient considérés comme des marqueurs pertinents de la circulation de T. gondii, peu d’études ont ciblé ces hôtes en Afrique sub-saharienne. Le but de cette étude était d’étudier la séroprévalence de Toxoplasma chez les rongeurs des villes et des villages du Sénégal. Les rongeurs ont été échantillonnés dans 40 localités avec un protocole de piégeage standardisé. La détection des anticorps contre T. gondii a été faite sur 1205 rongeurs avec un test d’agglutination modifié. Les données de séroprévalence ont été analysées en fonction de la géographie, de la communauté locale de rongeurs et de caractéristiques individuelles du rongeur. Nous avons trouvé 44 individus séropositifs, de quatre espèces différentes (Mastomys erythroleucus, Mastomys natalensis, Mus musculus domesticus, Rattus rattus). La séroprévalence moyenne est faible, de l’ordre de 4 % au sein des localités. Les plus fortes séroprévalences (jusqu’à 24 %) ont été observées dans le Nord du Sénégal, une région connue pour être le coeur de l’élevage pastoral dans le pays.
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- 2018
11. Genetic structure and invasion history of the house mouse (Mus musculus domesticus) in Senegal, West Africa: a legacy of colonial and contemporary times
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Mamadou Kane, Sylvain Piry, Raphaël Leblois, Anne Loiseau, Youssoupha Niang, Cédric Lippens, Karine Berthier, Mamoudou Diallo, Jean-Marc Duplantier, Arnaud Estoup, M.K. Hima, Carine Brouat, Caroline Tatard, Aliou Sow, Khalilou Bâ, Ambroise Dalecky, Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut de Biologie Computationnelle (IBC), Institut National de la Recherche Agronomique (INRA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Station de Pathologie Végétale (AVI-PATHO), Institut National de la Recherche Agronomique (INRA), Funding provided by the Institut de Recherche pour le Developpement (IRD)., ANR-11-JSV7-0006,ENEMI,Conséquences évolutives des ennemis naturels dans des invasions biologiques majeures : le rôle des parasites dans le succès de l'invasion de deux rongeurs commensaux(2011), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche pour le développement (IRD [Sénégal]), and Unité de Pathologie Végétale (PV)
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0106 biological sciences ,0301 basic medicine ,Demographic history ,MESH: Bayes Theorem ,Population genetics ,MESH: Genetics, Population ,010603 evolutionary biology ,01 natural sciences ,DNA, Mitochondrial ,House mouse ,03 medical and health sciences ,Mice ,MESH: Senegal ,Genetic variation ,Genetics ,Animals ,MESH: Animals ,MESH: Genetic Variation ,MESH: Models, Genetic ,MESH: Mice ,Genetics (clinical) ,[SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] ,biology ,Models, Genetic ,Ecology ,MESH: Animal Distribution ,MESH: DNA, Mitochondrial ,Genetic Variation ,Bayes Theorem ,biology.organism_classification ,Senegal ,Phylogeography ,030104 developmental biology ,Genetics, Population ,MESH: Phylogeography ,Genetic structure ,Biological dispersal ,Original Article ,MESH: Microsatellite Repeats ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,Animal Distribution ,Founder effect ,Microsatellite Repeats ,[SDV.EE.IEO]Life Sciences [q-bio]/Ecology, environment/Symbiosis - Abstract
12 pages; International audience; Knowledge of the genetic make-up and demographic history of invasive populations is critical to understand invasion mechanisms. Commensal rodents are ideal models to study whether complex invasion histories are typical of introductions involving human activities. The house mouse Mus musculus domesticus is a major invasive synanthropic rodent originating from South-West Asia. It has been largely studied in Europe and on several remote islands, but the genetic structure and invasion history of this taxon have been little investigated in several continental areas, including West Africa. In this study, we focussed on invasive populations of M. m. domesticus in Senegal. In this focal area for European settlers, the distribution area and invasion spread of the house mouse is documented by decades of data on commensal rodent communities. Genetic variation at one mitochondrial locus and 16 nuclear microsatellite markers was analysed from individuals sampled in 36 sites distributed across the country. A combination of phylogeographic and population genetics methods showed that there was a single introduction event on the northern coast of Senegal, from an exogenous (probably West European) source, followed by a secondary introduction from northern Senegal into a coastal site further south. The geographic locations of these introduction sites were consistent with the colonial history of Senegal. Overall, the marked microsatellite genetic structure observed in Senegal, even between sites located close together, revealed a complex interplay of different demographic processes occurring during house mouse spatial expansion, including sequential founder effects and stratified dispersal due to human transport along major roads.
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- 2017
12. Biological invasions in rodent communities: from ecological interactions to zoonotic bacterial infection issues
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Khalilou Bâ, Nathalie Charbonnel, d’Ambrosio J, Christophe Diagne, Maxime Galan, Carine Brouat, Caroline Tatard, Aliou Sow, Mamadou Kane, Jean-François Cosson, Youssoupha Niang, Ambroise Dalecky, Odile Fossati-Gaschignard, Mbacké Sembène, Anne Loiseau, Mamoudou Diallo, and Lucie Tamisier
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0106 biological sciences ,2. Zero hunger ,Zoonotic Bacterial Infection ,biology ,Rodent ,Ecology ,Ecology (disciplines) ,030231 tropical medicine ,Biodiversity ,Community structure ,Parasitism ,Zoology ,15. Life on land ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,House mouse ,03 medical and health sciences ,0302 clinical medicine ,Black rat ,13. Climate action ,biology.animal - Abstract
Several hypotheses (such as ‘enemy release’, ‘novel weapon’, ‘spillback’ and ‘dilution/density effect’) suggest changes in host-parasite ecological interactions during biological invasion events. Such changes can impact both invasion process outcome and the dynamics of exotic and/or endemic zoonotic diseases. To evaluate these predictions, we investigated the ongoing invasions of the house mouse Mus musculus domesticus, and the black rat, Rattus rattus, in Senegal (West Africa). We focused on zoonotic bacterial communities depicted using 16S rRNA amplicon sequencing approach in both invasive and native rodents sampled along two well-defined invasion routes. Overall, this study provided new ecological evidence connecting parasitism and rodent invasion process, with diverse potential roles of zoonotic bacteria in the invasion success. Our results also highlighted the main factors that lie behind bacterial community structure in commensal rodents. Further experimental studies as well as comparative spatio-temporal surveys are necessary to decipher the actual role of zoonotic bacteria in these invasions. Our data also gave new support for the difficulty to predict the direction in which the relationship between biodiversity changes and disease risk could go. These results should be used as a basis for public health prevention services to design reservoir monitoring strategies based on multiple pathogen surveillance.
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- 2017
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13. Contemporary variations of immune responsiveness during range expansion of two invasive rodents in Senegal
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Ambroise Dalecky, Stéphane Cornet, Mbacké Sembène, Souleymane Doucoure, Laëtitia Husse, Nathalie Charbonnel, Khalilou Bâ, Emmanuelle Artige, Aliou Sow, Sylvain Piry, Odile Fossati-Gaschignard, Christophe Diagne, Mamadou Kane, Youssoupha Niang, Carine Brouat, Emmanuelle Gilot-Fromont, Mamoudou Diallo, Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Biodémographie évolutive, Département écologie évolutive [LBBE], 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), Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR48, INSB-INSB-Centre National de la Recherche Scientifique (CNRS), Laboratoire Population-Environnement-Développement (LPED), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU), This work was supported by the ANR ENEMI project (ANR-11-JSV7-0006)., ANR-11-JSV7-0006,ENEMI,Conséquences évolutives des ennemis naturels dans des invasions biologiques majeures : le rôle des parasites dans le succès de l'invasion de deux rongeurs commensaux(2011), Institut des sciences biologiques (INSB-CNRS)-Institut des sciences biologiques (INSB-CNRS)-Centre National de la Recherche Scientifique (CNRS), dalecky, ambroise, and Jeunes Chercheuses et Jeunes Chercheurs - Conséquences évolutives des ennemis naturels dans des invasions biologiques majeures : le rôle des parasites dans le succès de l'invasion de deux rongeurs commensaux - - ENEMI2011 - ANR-11-JSV7-0006 - JCJC - VALID
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0106 biological sciences ,0301 basic medicine ,[SDV.IMM] Life Sciences [q-bio]/Immunology ,Range (biology) ,[SDE.MCG]Environmental Sciences/Global Changes ,Zoology ,Introduced species ,010603 evolutionary biology ,01 natural sciences ,Invasive species ,Life history theory ,03 medical and health sciences ,Immune system ,[SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology ,Ecology, Evolution, Behavior and Systematics ,biology ,Ecology ,15. Life on land ,biology.organism_classification ,[SDE.BE] Environmental Sciences/Biodiversity and Ecology ,[SDE.MCG] Environmental Sciences/Global Changes ,030104 developmental biology ,Mastomys ,biology.protein ,[SDV.IMM]Life Sciences [q-bio]/Immunology ,[SDV.BA.ZV] Life Sciences [q-bio]/Animal biology/Vertebrate Zoology ,House mice ,Antibody ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology - Abstract
International audience; Biological invasions provide unique opportunities for studying life history trait changes over contemporary time scales. As spatial spread may be related to changes in parasite communities, several hypotheses (such as the evolution of increased competitive ability (EICA) or EICA-refi ned hypotheses) suggest immune changes in invasive species along invasion gradients. Although native hosts may be subject to similar changes in parasite selection pressures, their immune responses have been rarely investigated in invasion contexts. In this study, we evaluated immune variations for invasive house mice Mus musculus domesticus , invasive black rats Rattus rattus and native rodents Mastomys erythroleucus and Mastomys natalensis along well-characterised invasion gradients in Senegal. We focused on antibody-mediated (natural antibodies and complement) and infl ammatory (haptoglobin) responses. One invasion route was considered for each invasive species, and environmental conditions were recorded. Natural-antibody mediated responses increased between sites of long-established invasion and recently invaded sites only in house mice. Both invasive species exhibited higher infl ammatory responses at the invasion front than in sites of long-established invasion. Th e immune responses of native species did not change with the presence of invasive species. Th ese patterns of immune variations do not support the EICA and EICA refi ned hypotheses, and they rather suggest a higher risk of exposure to parasites on the invasion front. Altogether, these results provide a fi rst basis to further assess the role of immune changes in invasion success.
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- 2016
14. Parasites and invasions: changes in gastrointestinal helminth assemblages in invasive and native rodents in Senegal
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Sylvain Piry, Mamadou Kane, Carine Brouat, Philippe Gauthier, Caroline Tatard, Nathalie Charbonnel, Aliou Sow, Alexis Ribas, Odile Fossati-Gaschignard, Ambroise Dalecky, Youssoupha Niang, Khalilou Bâ, Voitto Haukisalmi, Christophe Diagne, Mbacké Sembène, Mamoudou Diallo, Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Laboratory of Parasitology, University of Barcelona, Laboratoire Population-Environnement-Développement (LPED), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU), Finnish Museum of Natural History (LUOMUS), University of Helsinki, ENEMI project (ANR-11-JSV7- 0006), ANR-11-JSV7-0006,ENEMI,Conséquences évolutives des ennemis naturels dans des invasions biologiques majeures : le rôle des parasites dans le succès de l'invasion de deux rongeurs commensaux(2011), Universitat de Barcelona, and Helsingin yliopisto = Helsingfors universitet = University of Helsinki
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0301 basic medicine ,Male ,0106 biological sciences ,Hymenolepiasis ,Range (biology) ,Enemy release ,Introduced species ,01 natural sciences ,Gastrointestinal helminths ,House mouse ,Invasive species ,Rodent Diseases ,Mice ,Prevalence ,Parasite hosting ,Intestinal Diseases, Parasitic ,Oxyuriasis ,Parasite community structure ,0303 health sciences ,Mus musculus domesticus ,biology ,Ecology ,[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] ,Senegal ,Infectious Diseases ,Black rat ,Female ,Helminthiasis, Animal ,Paràsits ,[SDE.MCG]Environmental Sciences/Global Changes ,Zoology ,Spillback ,010603 evolutionary biology ,Rattus rattus ,03 medical and health sciences ,Rates ,[SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology ,Animals ,Helminths ,Parasites ,Biological invasions ,030304 developmental biology ,15. Life on land ,biology.organism_classification ,Rats ,Gastrointestinal Tract ,Spillover ,030104 developmental biology ,Mastomys ,Parasitology ,Murinae ,Species richness ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,Introduced Species - Abstract
Understanding why some exotic species become widespread and abundant in their colonized range is a fundamental issue that still needs to be addressed. Among many hypotheses, newly established host populations may benefit from a parasite loss (“enemy release” hypothesis) through impoverishment of their original parasite communities or reduced infection levels. Moreover, the fitness of competing native hosts may be affected by the acquisition of exotic taxa from invaders (“parasite spillover”) and/or by an increased transmission risk of native parasites due to their amplification by invaders (“parasite spillback”). We focused on gastrointestinal helminth communities to determine whether these predictions could explain the ongoing invasion success of the commensal house mouse (Mus musculus domesticus) and black rat (Rattus rattus), as well as the associated drop of native Mastomys species, in Senegal. For both invasive species, our results were consistent with the predictions of the enemy release hypothesis. A decrease of helminth overall prevalence and individual species richness was observed along the invasion gradients as well as lower specific prevalence/abundance (Aspiculuris tetraptera in M. m. domesticus, Hymenolepis diminuta in R. rattus) on the invasion fronts. Conversely, we did not find strong evidence of helminth spill-over or spill-back in invasion fronts, where native and invasive rodents co-occurred. Further experimental research is needed to determine whether and how the loss of helminths and reduced infection levels along invasion routes may result in any advantageous effects on invader fitness and competitive advantage.
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- 2016
15. Spatial Segregation between Invasive and Native Commensal Rodents in an Urban Environment: A Case Study in Niamey, Niger
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Ambroise Dalecky, Philippe Gauthier, Sophie Veran, Sama Gagaré, Mamadou Kane, Karmadine Hima, Gauthier Dobigny, Madougou Garba, Jean-Pierre Rossi, Ibrahima Kadaoure, Caroline Tatard, Direction Générale de la Protection des Végétaux, Ministère de l'Agriculture, Département Formation Recherche, Centre Régional AGRHYMET (CRA), Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Laboratoire Population-Environnement-Développement (LPED), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU), Université Abdou Moumouni [Niamey], Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), and IRD (France)
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Rodent ,Invasive Species ,lcsh:Medicine ,Introduced species ,Invasive species ,Urban Environments ,11. Sustainability ,USAid/Fews-Net ,Niger ,lcsh:Science ,Campus ISRA-IRD Dakar-Bel-Air ,Multidisciplinary ,Ecology ,Biodiversity ,Terrestrial Environments ,Senegal ,Urban ecology ,Agrhymet ,IRD ,espèce native ,Rodent Control ,Public Health ,Campus International Baillarguet ,France ,Research Article ,Occupancy ,Ecology (disciplines) ,Rodentia ,Biology ,Species Colonization ,biology.animal ,Animals ,espace urbain ,espèce invasive ,Urban Ecology ,Cities ,ségrégation spatiale ,CBGP ,Spatial Analysis ,Montferrier-sur-Lez ,Niamey ,Population Biology ,rongeur ,Ecology and Environmental Sciences ,lcsh:R ,Biology and Life Sciences ,INRA ,15. Life on land ,biology.organism_classification ,Dakar ,[SDE.ES]Environmental Sciences/Environmental and Society ,Commensalism ,Species Interactions ,Mastomys ,lcsh:Q ,Population Ecology ,Introduced Species ,Urban environment - Abstract
Times Cited: 0; International audience; Invasive rodents have been responsible for the diffusion worldwide of many zoonotic agents, thus representing major threats for public health. Cities are important hubs for people and goods exchange and are thus expected to play a pivotal role in invasive commensal rodent dissemination. Yet, data about urban rodents' ecology, especially invasive vs. native species interactions, are dramatically scarce. Here, we provide results of an extensive survey of urban rodents conducted in Niamey, Niger, depicting the early stages of rodent bioinvasions within a city. We explore the species-specific spatial distributions throughout the city using contrasted approaches, namely field sampling, co-occurrence analysis, occupancy modelling and indicator geostatistics. We show that (i) two species (i.e. rural-like vs. truly commensal) assemblages can be identified, and that (ii) within commensal rodents, invasive (Rattus rattus and Mus musculus) and native (Mastomys natalensis) species are spatially segregated. Moreover, several pieces of arguments tend to suggest that these exclusive distributions reflect an ongoing native-to-invasive species turn over. The underlying processes as well as the possible consequences for humans are discussed.
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- 2014
16. Local perception of rodent-associated problems in Sahelian urban areas: a survey in Niamey, Niger
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Jean-Pierre Rossi, Sama Gagaré, Ramatou Sidikou, Mamadou Kane, Ibrahima Kadaoure, Gauthier Dobigny, Madougou Garba, Direction Générale de la Protection des Végétaux, Ministère de l'Agriculture du Niger, Département Formation Recherche, Centre Régional AGRHYMET (CRA), Université Abdou Moumouni [Niamey], Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Famine Early Warning Systems Network, Partenaires INRAE, and Institut de Recherche pour le Développement
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0106 biological sciences ,medicine.medical_specialty ,media_common.quotation_subject ,[SDV]Life Sciences [q-bio] ,030231 tropical medicine ,Vulnerability ,Sahelian area ,010603 evolutionary biology ,01 natural sciences ,03 medical and health sciences ,0302 clinical medicine ,Perception ,West Africa ,medicine ,Pest rodents ,Socioeconomics ,media_common ,Public health ,Food security ,Ecology ,biology ,business.industry ,biology.organism_classification ,3. Good health ,Urban Studies ,Geography ,Urban ecology ,Agriculture ,Mastomys ,Damages ,business - Abstract
International audience; Rodents are involved in the epidemiology of many pathogens and are major pests for agriculture. Local perception and beliefs about rodents and their damages is a key element of control programs. We here present the first survey focusing on the human perception of rodent-associated problems in an African town, namely Niamey, Niger. In total, 170 interviews were conducted in 18 different urban districts where rodents (Mastomys natalensis, Rattus rattus and Mus musculus) are widespread and abundant. Rodent-associated problems were mentioned in almost all instances (96.5 %). Eight different categories of rodent-induced nuisances could be recurrently identified. The most frequently cited one consists in damages on food and food stocks (63.1 %), followed by damages on houses (47.3 %), furniture (19.5 %) and clothes (16.8 %). There was no significant association between damages and districts, which means that the perception of rodent-associated problems did not vary significantly across the city. Our survey strongly suggests that rodents may represent major pests not only for farmers, but also for inhabitants of towns, thus contributing to reinforce economic vulnerability. Finally, no mention of sanitary or medical problems was ever recorded during our survey, thus pointing towards an apparent absence of knowledge about the potential role of rodents in some public health issues.
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- 2014
17. Genetic structure and local adaptation of European wheat yellow rust populations: the role of temperature-specific adaptation
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Mboup, Mamadou Kane, Bahri, Bochra Amina, Leconte, Marc, Pope De Vallavieille, Claude, Kaltz, Olivier, Enjalbert, Jerome, BIOlogie et GEstion des Risques en agriculture (BIOGER), AgroParisTech-Institut National de la Recherche Agronomique (INRA), Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), Génétique Quantitative et Evolution - Le Moulon (Génétique Végétale) (GQE-Le Moulon), Centre National de la Recherche Scientifique (CNRS)-AgroParisTech-Université Paris-Sud - Paris 11 (UP11)-Institut National de la Recherche Agronomique (INRA), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UR226, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), and Institut National de la Recherche Agronomique (INRA)-Université Paris-Sud - Paris 11 (UP11)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS)
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[SDV.SA]Life Sciences [q-bio]/Agricultural sciences ,sp ,fungi ,food and beverages ,genotype environment interaction ,plant pathogen ,yellow ,climate change ,temperature adaptation ,stripe rust ,wheat ,tritici ,local adaptation ,Puccinia striiformis f - Abstract
Environmental heterogeneity influences coevolution and local adaptation in hostparasite systems. This also concerns applied issues, because the geographic range of parasites may depend on their capacity to adapt to abiotic conditions. We studied temperature-specific adaptation in the wheat yellow/stripe rust pathogen, Puccinia striiformis f.sp. tritici (PST). Using laboratory experiments, PST isolates from northern and southern France were studied for their ability to germinate and to infect bread and durum wheat cultivars over a temperature gradient. Pathogen origin x temperature interactions for infectivity and germination rate suggest local adaptation to high- versus low-temperature regimes in south and north. Competition experiments in southern and northern field sites showed a general competitive advantage of southern over northern isolates. This advantage was particularly pronounced in the southern home site, consistent with a model integrating laboratory infectivity and field temperature variation. The stable PST population structure in France likely reflects adaptation to ecological and genetic factors: persistence of southern PST may be due to adaptation to the warmer Mediterranean climate; and persistence of northern PST can be explained by adaptation to commonly used cultivars, for which southern isolates are lacking the relevant virulence genes. Thus, understanding the role of temperature-specific adaptations may help to improve forecast models or breeding programmes.
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- 2012
18. Clonality and recombination in wheat yellow rust
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Enjalbert, Jerome, Leconte, Marc, Bahri, Bochra Amina, Mboup, Mamadou Kane, Ali, Sajid, Pope De Vallavieille, Claude, Génétique Quantitative et Evolution - Le Moulon (Génétique Végétale) (GQE-Le Moulon), Institut National de la Recherche Agronomique (INRA)-Université Paris-Sud - Paris 11 (UP11)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS), BIOlogie et GEstion des Risques en agriculture (BIOGER), AgroParisTech-Institut National de la Recherche Agronomique (INRA), Centre National de la Recherche Scientifique (CNRS)-AgroParisTech-Université Paris-Sud - Paris 11 (UP11)-Institut National de la Recherche Agronomique (INRA), ProdInra, Archive Ouverte, and Institut National de la Recherche Agronomique (INRA)-AgroParisTech
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[SDV.SA]Life Sciences [q-bio]/Agricultural sciences ,[SDV.SA] Life Sciences [q-bio]/Agricultural sciences ,CLONALITY ,WHEAT ,WORLDWIDE ,CLONE ,POPULATION - Abstract
absent
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- 2011
19. A cytotaxonomic and DNA-based survey of rodents from Northern Cameroon and Western Chad
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K. Ba, Gauthier Dobigny, Carine Brouat, Caroline Tatard, Philippe Gauthier, Mamadou Kane, Jean-Marc Duplantier, Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Institut de Recherche pour le Développement, Partenaires INRAE, Institut de recherche pour le développement (IRD [Sénégal]), 'Exten- sionofborreliosisdistributioninWestAfrica'(GICC/MEDDFrance) program, and French National Agency for Research (pro- gramANR-05-JC05-48631,resp.G.Dobigny)
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0106 biological sciences ,Species complex ,taterillus lacustris ,African biodiversity ,[SDV]Life Sciences [q-bio] ,Biodiversity ,Zoology ,010603 evolutionary biology ,01 natural sciences ,03 medical and health sciences ,Sensu ,Praomys ,Cytotaxonomy ,Ecology, Evolution, Behavior and Systematics ,molecular systematics ,030304 developmental biology ,Taterillus ,Molecular systematics ,cytotaxonomy ,0303 health sciences ,biology ,Ecology ,Taterillus lacustris ,african biodiversity ,15. Life on land ,biology.organism_classification ,praomys ,Animal ecology ,Molecular phylogenetics ,Animal Science and Zoology - Abstract
Rodent diagnosis has long remained obscured by the co-existence of cryptic species in many lineages. However, alternative and accessible methods, such as cytotaxonomy and DNA-based methods, are now available that allow biologists to accurately monitor biodiversity through the production of well documented lists of unambiguously species-specific identifications. As a continuation of our previous surveys of West African rodents, we here present the first rodent inventory of rodents from Northern Cameroon (as well as one locality in Western Chad) that fully relies on karyotypic and/or sequencing data. Doing so, we assess the presence of 18 species in this poorly documented region. Among them, we found several African spiny mice that could be referred as to A. johannis, a poorly documented species. Moreover, several Arvicanthis individuals could be aggregated with previously studied but still enigmatic specimens of ANI-2 and ANI-4 sensu Volobouev et al., 2002a , Volobouev et al., 2002b , thus suggesting that they may all belong to one single species, namely A. rufinus. In addition, one specimen was shown to belong to a new biological species (Praomys sp.) that will deserve further taxonomic investigations. Finally, several Taterillus specimens were found with 2n = 28–30 chromosomes and a XX/XY1Y2 sex chromosome system. On the basis of these new results as well as a reinterpretation of previously published data, we propose to refer these individuals as to the poorly documented Taterillus lacustris. Altogether, our data suggest that Northern Cameroon is a “phylogeographical node” for several rodent lineages which may be at least partly explained by the past changes within the Lake Chad basin. Keeping this in mind, there is little doubt that biodiversity will undergo important modifications in the coming decades, following the increasing aridity and the drastic reduction of Lake Chad.
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- 2011
20. Evidence of genetic recombination in Chinese wheat yellow rust populations
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Mboup, Mamadou Kane, Leconte, Marc, de Vallavieille-Pope, Claude, Enjalbert, Jerome, BIOlogie et GEstion des Risques en agriculture (BIOGER), AgroParisTech-Institut National de la Recherche Agronomique (INRA), and Institut National de la Recherche Agronomique (INRA)-AgroParisTech
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PARASEXUALITY ,CLONALITY ,PUCCINIA STRIIFORMIS ,EFFECTIVE SIZE ,OVERSUMMERING ,GENETIC DIVERSITY ,ComputingMilieux_MISCELLANEOUS ,[SDV.BV.PEP]Life Sciences [q-bio]/Vegetal Biology/Phytopathology and phytopharmacy - Abstract
International audience
- Published
- 2007
21. Host ecology and variation in helminth community structure in Mastomys rodents from Senegal
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J. M. Duplantier, M. Diouf, R. Sall-Dramé, Mamadou Kane, C. Brouat, Khalilou Bâ, Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Institut de recherche pour le développement (IRD [Sénégal]), Département de Biologie Animale, Faculté des Sciences et Techniques, and Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD)
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0106 biological sciences ,Sympatry ,nematode ,[SDV]Life Sciences [q-bio] ,Population ,Cestoda ,Zoology ,010603 evolutionary biology ,01 natural sciences ,030308 mycology & parasitology ,Host-Parasite Interactions ,Rodent Diseases ,03 medical and health sciences ,Abundance (ecology) ,Helminths ,structure communauté ,Prevalence ,Parasite hosting ,Animals ,cestode ,education ,commensal habitat ,Ecosystem ,RELATION HOTE-PARASITE ,0303 health sciences ,education.field_of_study ,BIOLOGIE DES POPULATIONS ,biology ,Ecology ,Host (biology) ,rodent ,habitat commensal ,Mastomys spp ,biology.organism_classification ,Senegal ,community diversity ,Infectious Diseases ,Habitat ,Mastomys ,parasite ,Animal Science and Zoology ,Parasitology ,habitat variation ,Murinae ,Helminthiasis, Animal ,variation d'habitat - Abstract
Contact: Fax: +33499623345. E-mail: brouat@mpl.ird.fr; International audience; We studied patterns of variation in parasite communities of 2 closely related species of Mastomys rodents. These 2 species live in sympatry in South-eastern Senegal, but differ drastically in their habitat choice. We asked (a) whether the host species have the same parasites; (b) whether there is any observable pattern relative to the host species/habitat type in the structure of parasite communities; (c) whether the variability in parasite community for each host species is related to habitat characteristics. We analysed 220 and 264 individuals of each host species, sampled respectively in 10 and 11 trap sites. Twenty parasite taxa were recorded, and the majority were nematodes. Between-host species comparisons showed that helminth communities were slightly more diversified in M. natalensis. Many parasite species were found in both Mastomys. However, various helminth taxa varied in frequency and abundance between host species. Within each host species, helminth diversity, prevalence and/or abundance of some parasites were correlated with habitat or host population factors that may influence parasite life-cycles, such as village structure, or the presence/absence of a pool. Our results suggest that habitat characteristics have a strong impact on helminth community structure.
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- 2007
22. Significantly reduced intensity of infection but persistent prevalence of schistosomiasis in a highly endemic region in Mali after repeated treatment.
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Aly Landouré, Robert Dembélé, Seydou Goita, Mamadou Kané, Marjon Tuinsma, Moussa Sacko, Emily Toubali, Michael D French, Adama D Keita, Alan Fenwick, Mamadou S Traoré, and Yaobi Zhang
- Subjects
Arctic medicine. Tropical medicine ,RC955-962 ,Public aspects of medicine ,RA1-1270 - Abstract
BACKGROUND: Preventive chemotherapy against schistosomiasis has been implemented since 2005 in Mali, targeting school-age children and adults at high risk. A cross-sectional survey was conducted in 2010 to evaluate the impact of repeated treatment among school-age children in the highly-endemic region of Segou. METHODOLOGY/PRINCIPAL FINDINGS: The survey was conducted in six sentinel schools in three highly-endemic districts, and 640 school children aged 7-14 years were examined. Infections with Schistosoma haematobium and S. mansoni were diagnosed with the urine filtration and the Kato-Katz method respectively. Overall prevalence of S. haematobium infection was 61.7%, a significant reduction of 30% from the baseline in 2004 (p
- Published
- 2012
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