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[Intestinal schistosomiasis in the freshwater mangrove of Guadalupe (French Antilles). Ecology of the vector, Biomphalaria glabrata and its parasite Schistosoma mansoni (author's transl)].

In the freshwater mangrove of Dubelloy-Devarieux (Guadalupe), the dynamics of populations of B. glabrata and the transmission of S. mansoni, mostly depends on the alternation of dry and rainy season. The flooding of the mangrove (in september), permits a yearly renewal of the malacological populations. The sizes analysis of the snails shows that the life cycle of B. glabrata include two rainy seasons separated by one dry season. The prevalence of B. glabrata (0,25%) and cercariae densities (0,8 c/l) are very slow. The acrophase of the rhythm of presence in standing waters is reached at 2 pm. Men and rats are infected. The infections of rats is of 20% at the beginning of the rainy season and of 100% at the end of the rainy season. Principal factors involved in the infection of rats are discussed.

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