Snails are known to serve as an intermediate host for several species of larval trematodes. Snails belong to a large group of invertebrates such as the phylum – Mollusca, class – Gastropoda. Snails were collected from July 2018 to June 2019 from various water bodies like ponds, pools, ditches, lake reservoirs, rivers (Garh Ganga) and crop fields of the Meerut region. They were collected in laboratory containers and beakers and maintained in aquariums and fed with natural food like lettuce leaf and ad libitum with Hydrilla. A Total 200 snails were collected with different species like Bellamya bengalensis, Lymnaea luteola and Lymnaea acuminata in the Meerut region. The occurrence of the larval trematode parasite was found. The effect of parasitism by excretory metabolism of the host revealed that it excreted more urea when it is parasitized by E. cercaria.
Excretory Metabolism, Bellamya bengalensis, Lymnaea luteola, Cercaria
