Abstract: Pseudorasbora parva collected from six fishponds around Zhenlai county, Baicheng area in Jilin province were examined for metacercaria (Clonorchis sinensis) by the methods of direct pressing slice and artificial digestion in order to carry out statistical survey for infective rate of metacercaria of Pseudorasbora parva. The highest infection rate and strongest infective intensity area of freshwater fishes with metacercariae was the sixth field of Sifangtuo. Subsequently, investigating all kinds of fishes of the strongest infective intensity area to learn information of infection of metacercaria. The results displayed the highest infective rate were 100% in Pseudorasbora parva, Pseudolaubuca sinensis and Phoxinus oxycephalus, then was 80% in Brachymystax Lenok. However, the other kinds of fishes weren’t detected out metacercaria.

Key words: freshwater fish and shrimp; Clonorchis sinensis; metacercaria; infective rate