
The descendants of the planorbid snail Biomphalaria peregrina, collected in the region of Santa Rita do Sapucaí, Minas Gerais, Brazil, were exposed to miracidia of three strains of Schistosoma mansoni: "LE" strain from Belo Horizonte, State of Minas Gerais; "SJ", strain from São José dos Campos, State of São Paulo and "AL" strain from State of Alagoas. Of 300 snails exposed to miracidia of the three strains, none was infected. On the other hand, 300 Biomphalaria glabrata of the control groups showed infection rates of 61.1 to 95.3% with the three strains. The mortality rates of B. peregrina and B. glabrata were 20% and 28%, respectively.
Biomphalaria, Animals, Schistosoma mansoni, Brazil, Immunity, Innate, Schistosomiasis mansoni
Biomphalaria, Animals, Schistosoma mansoni, Brazil, Immunity, Innate, Schistosomiasis mansoni
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