[Chaetotaxic variations of the cercaria Schistosoma mansoni from a human strain during successive transmissions through mice (author's transl)].

The "cercarian chaetotaxic index" from the human strain of Schistosoma mansoni from West Africa is conspicuously modified during the third transmission Biomphalaria pfeifferi-white mouse only. This might be the explanation why Planorbs collected in Guadeloupe discharge slightly different cercariae whether they come from stations where the infestation is predominantly from human origin or from stations where the infestation is predominantly from murine origin. On the contrary, the "Grand Etang" station is significatively different from all the others and seems to be exclusively murine transmitted.