On the resistance of the snail, Lymnaea catascopium pallida (Adams) to concurrent infection with sporocysts of the strigeid trematodes, Cotylurus flabelliformis (Faust) and Diplostomum flexicaudum (Cort and Brooks).
D000818:Animals; D007814:Larva; D012908:Snails / Q000276:immunology*; D014201:Trematode Infections / Q000150:complications / Q000276:immunology*