Investigation of the status of Clonorchis sinensis infection in Shenzhen areas

Objective To investigate the infectious status of Clonorchis sinensis metacercariae in freshwater fish in Shenzhen area, analyze its prevalent features and provide scientific basis for making effective control measures in Shenzhen area. Methods Freshwater fishes from Nanshan Distict, Futian, Yantian, Luohu, Baoan and Longgang were selectively detected for Clonorchis sinensis metacercariae with digestion method. 3088 human serum samples was determined for specific antibody by ELISA. Results The encysted Clonorchis sinensis metacercariae were detected from muscles of freshwater fish with a positive rate of 17.50% (from 26.0% to 14.0%). The situation of Clonorchis sinensis metacercaria infection in freshwater fishes was most serious in Longgang District and less serious in Luohu District. The infection rate in Campo was highest in all 16 kinds of fish tested. The total antibody positive rate was 3%, and the positive rate was increased along with the increase of age. Conclusion The situation of Clonorchis sinensis infection in freshwater fish and humans was serious effective control measures be taken.