The histopathological and histochemical effects on the snail
Oxytrema siliqua, caused by the larvae of Nanophyetus salmincola,
have been studied. The parasite causes damage to the organ by increased
pressure, active ingestion of the hepatic tubules, and by
the increased burden placed upon the snail in disposing of the waste...
This study¹ was undertaken: (1) to obtain information on the distribution of the snail, Oxytrema silicula, in three coastal rivers in Oregon, and the seasonal incidence of infection in these snails and in snails from an inland stream, with the cercariae of the trematode, Nanophyetus salinincola; (2) to follow cercarial...