Definition: Marine, freshwater, or terrestrial mollusks of the class Gastropoda. Most have an enclosing spiral shell, and several genera harbor parasites pathogenic to man.
as animal & food; IM; GEN or unspecified; prefer specifics; as food, coord IM with SHELLFISH (IM); /microbiol /parasitol /virol permitted
ExamplesBiomphalaria; Bulinus; Helix (Snails); Lymnaea