Background: Clonorchis sinensis is an important fish-borne small liver fluke, that is a listed carcinogen for humans. Approximately 1 million people are infected with small liver flukes in Vietnam. In order for control programmes to be successful, it is essential to identify highly endemic areas and unravel risk factors associated with C. sinensis infection; however, a comprehensive study investigating risk factors for C. sinensis infection in Vietnam is lacking up to now. The aim of this study is to identify the prevalence of C. sinensis infection and associated risk factors in rural communities in northern Vietnam.Methods & Materials: A cross-sectional study was conducted in 4 communes in Yen Bai and Thanh Hoa provinces where C. sinensis infection is known to be present and raw fish consumption is common. A total of 841 residents over 6 years old were recruited
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