[Preliminary study on the ecology of Trichobilharzia cercariae in the Huaihe river system].

Objective: To investigate the ecological habit and characteristics of Trichobilharzia cercariae in the Huaihe river system.

Methods: During June of 2002-May of 2003, Radix auricularia snails were collected monthly in Yaohe Fishery of the branch of the Huaihe River. The cercariae, released from the positive snails and collected by Shade Drop Bottle, were examined by direct press.