title: Effect of duration and intensity of infection with Echinostoma audyi on survival of Lymnaea rubiginosa exposed to copper sulfate.
abstract: Lymnaea rubiginosa infected with 1 to 5 miracidia of Echinostoma audyi for 1, 2, 3, and 5 weeks, and snails infected with up to 10 or 20 miracidia for 3 weeks, were exposed to copper (Cu) as CuSO4 2 hr and allowed to recover 48 hr. In general, snails ininfected with up to 5 miracidia of E. audyi were no more susceptible to Cu than noninfected snails. Snails infected with up to 10 miracidia for 3 weeks were 1.3 times more susceptible to Cu than noninfected snails. However, snails infected with up to 20 miracidia for 3 weeks were not more susceptible to Cu, possibly because infection with such a large number of parasites eliminated the most susceptible snails from the population prior to exposure to Cu.
mesh_terms: D000818:Animals; D003300:Copper / Q000494:pharmacology*; D004449:Echinostoma; D007814:Larva; D008195:Lymnaea / Q000187:drug effects / Q000469:parasitology*; D008975:Molluscacides / Q000494:pharmacology*
chemical_list: D008975:Molluscacides; D003300:Copper