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Dobigny Gauthier, Gauthier Philippe, Houéménou G., Dossou H. J., Badou S., Etougbétché J., Tatard C., Truc Philippe. (2019). Spatio-temporal survey of small mammal-borne Trypanosoma lewisi in Cotonou, Benin, and the potential risk of human infection. Infection, Genetics and Evolution, 75, art. no [103967], 7 p. ISSN 1567-7257

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Titre
Spatio-temporal survey of small mammal-borne Trypanosoma lewisi in Cotonou, Benin, and the potential risk of human infection
Année de publication2019
Type de documentArticle
AuteursDobigny Gauthier, Gauthier Philippe, Houéménou G., Dossou H. J., Badou S., Etougbétché J., Tatard C., Truc Philippe.
SourceInfection, Genetics and Evolution, 2019, 75, art. no [103967], 7 p. ISSN 1567-7257
RésuméHuman trypanosomoses are the sleeping sickness in Africa and Chagas disease in Latin America. However, atypical human infections by animal trypanosomes have been described, but poorly investigated. Among them, the supposed rat-specific T. lewisi was shown to be responsible for a few severe cases. In Africa, the scarcity of data and the null awareness about the atypical human trypanosomoses suggest that the number of cases may be higher that currently thought. Furthermore, T. lewisi is resistant to normal human serum and therefore a po-tential human pathogen. In order to document T. lewisi distribution and ecology, a qPCR- and 16DNA sequen-cing-based survey was conducted in 369 rodents from three urban districts of Cotonou city, Benin, during three different periods of the same year. Our study demonstrated very high prevalence (57.2%) even when considering only individuals identified as positive through DNA sequencing (39.2%). Black rats represented the most dominant as well as the most T. lewisi-parasitized species. No diffrence was retrieved neither between seasons nor districts, suggesting a large infestation of rodents by trypanosomes throughout the year and the city. Our results suggest that conditions are gathered for rat to human transmission of T. lewisi in these socio-en-vironmentally degraded urban areas, thus pointing towards the rapidly urbanizing Abidjan-Lagos corridor as a region at particular risk.
Plan de classementEntomologie médicale / Parasitologie / Virologie [052] ; Sciences du monde animal [080] ; Urbanisation et sociétés urbaines [102]
LocalisationFonds IRD [F B010076989]
Identifiant IRDfdi:010076989
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010076989

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