title: Studies of the freshwater cercariae of Kerala I. Incidence of infection and seasonal variation.
mesh_terms: D000818:Animals; D005618:Fresh Water; D007194:India; D007814:Larva; D008195:Lymnaea / Q000469:parasitology; D012621:Seasons; D012908:Snails / Q000469:parasitology*; D014200:Trematoda