ECOLOGY OF THE LEISHMANIA SPECIES IN THE GUIANAN ECOREGION COMPLEX

BRICE ROTUREAU Laboratoire Hospitalo-Universitaire de Parasitologie et Mycologie Médicale, Unité de Formation et de Recherche de Médecine de l’Université des Antilles et de la Guyane, Cayenne, French Guiana

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In the Guianan ecoregion complex, at least seven Leishmania species belonging to both the L. (Leishmania) Saf’ janova, 1982 and L. (Viannia) Lainson and Shaw, 1987 sub-genera are causative agents of American visceral leishmaniasis, mucocutaneous leishmaniasis, and cutaneous leishmaniases, including localized and diffuse forms. They are mostly sylvatic species subjugated to their own specific Lutzomyia sand fly vectors and to particular wild mammalian reservoir hosts of the dense rain forest. Originally implicated strictly in wild zoonoses and developing in forested ecotopes, Leishmania show a particular adaptive plasticity to face environmental modifications following deforestation and anthropization. This review presents the different pathogenic complexes of these parasites, emphasizes their implication in human diseases, and considers the influence of humans on their ecology.

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