''Fasciola Hepatica'' has a definitive ruminant mammalian host and an intermediate molluscan host. Within Europe the intermediate host is almost exclusively the snail 'Lymnaea truncatulata'. The snail habitat is crucial to the survival of the parasite, so wet conditions are favourable to the development and spread of Fasciola hepatica. | ''Fasciola Hepatica'' has a definitive ruminant mammalian host and an intermediate molluscan host. Within Europe the intermediate host is almost exclusively the snail 'Lymnaea truncatulata'. The snail habitat is crucial to the survival of the parasite, so wet conditions are favourable to the development and spread of Fasciola hepatica. |