title: Antagonism by the sporocyst stage of Trichobilharzia brevis (Trematoda: Schistosomatidae) against that of Echinostoma audyi (Trematoda: Echinostomatidae).
mesh_terms: D000818:Animals; D004449:Echinostoma / Q000254:growth & development; D004463:Ecology; D008195:Lymnaea; D014200:Trematoda / Q000254:growth & development