| field studies on the transmission and survival of cyclocoelum mutabile (digenea) infections in natural snail populations in southern manitoba, canada. | the transmission of cyclocoelum mutabile to snails was examined under natural conditions by sampling the snail communities of 4 natural ponds that had been exposed experimentally to infection by laboratory-infected coots (fulica americana). five of 6 snail species in the ponds, physa jennessi, promenetus exacuous, armiger crista, gyraulus parvus, and stagnicola elodes, became infected. no natural infections were found in the few helisoma trivolvis examined. the second most abundant species prome ... | 1995 | 7623191 |