Infection of single snails with two different trematodes. II. Dual exposures to a schistosome and an Echinostome at staggered intervals.
D000818:Animals; D004449:Echinostoma / Q000472:pathogenicity*; D007239:Infections; D008296:Malaysia; D012547:Schistosoma / Q000472:pathogenicity*; D012908:Snails