Investigation of Clonorchis sinensis Infection in Freshwater Fish in Shenzhen City

Objective To investigate infection situation of Clonorchis sinensis infection in freshwater fish in Shenzhen area, and to control the transmission and spread of Clonorchis sinensis in Shenzhen area. Methods Freshwater fishes from Nanshan, Futian, Yantian, Luohu, Baoan and Longgang were examined for metacercaria of Clonorchis sinensis using digestion method and PCR. Results The encysted metacercaria of Clonorchis sinensis were found in the muscles of freshwater fishes collected from the above six districts.The situation of metacercaria of Clonorchis sinensis infection in freshwater fishes was the most serious in Longgang and less serious in Luohu. The infection rate of campo was the highest in all kinds of the fish. Conclusion The infection situation of Clonorchis sinensis in feshwater fish from Shenzhen area was quite severe and the control of Clonorchis sinensis infection must be enforced.