[Factors conditioning the habitat of mollusc vectors of bilharziosis; their epidemiological incidence.  II.  Chemical factors; nutrition].
D000818:Animals; D017753:Ecosystem; D015994:Incidence; D008974:Mollusca; D011516:Prothrombin; D012552:Schistosomiasis / Q000635:transmission*; D012908:Snails
D011516:Prothrombin
SCHISTOSOMIASIS/transmission; SNAILS
Les facteurs conditionnant l'habitat des mollusques vecteurs des bilharzioses; leurs incidences épidémiologiques.  II.  Facteurs chimiques; nutrition.