[Epidemiological investigation of second intermediate hosts of Clonorchis sinensis in Pizhou and Xinyi cities of Jiangsu Province].

OBJECTIVE

To understand the endemic situation of Clonorchis sinensis in its second intermediate hosts in Pizhou and Xinyi cities of Jiangsu Province, so as to provide the evidence for the further control and treatment.

METHODS

Pseudorasbora parva and Abbottina rivularis were caught from the natural water body of Pizhou and Xinyi cities, and the tabletting microscopy method was applied to test the metacercaria of C. sinensis.

RESULTS

Totally 1 117 fishes were caught and dissected, including 792 P. parva (70.90%) and 325 A. rivularis (29.10%). The metacercaria of C. sinensis infection rates of P. parva and A. rivularis were 29.80% (236/792) and 4.62% (15/325) respectively, and the difference between the two kinds of fishes was significant (χ² = 83.88, P < 0.01).

CONCLUSION

The metacercaria of C. sinensis infection rate of freshwater fishes in Pizhou and Xinyi cities is high, and the local residents are facing the higher risk of clonorchiasis sinensis.