Clonorchis sinensis, the most widespread liver fluke of the parasite localized in liver and biliary tract, threats at least 19 millions of people in the world. The distribution of C. sinensis over almost all China (except the West-Northern area) and Taiwan, Korea, Japan and Northern regions of Vietnam. Since the first record of C. sinensis in Vietnam last century, up to date the disease has been reported from at least 12 provinces of the country. At the certain epidemiological foci, the rate of C. sinensis infection has not decreased but, in inverse, it seems to have tendency to increase. This review follows the worldwide and local literature in the domain to provide a brief summary on the distribution and status of C. sinensis infection and in the world, particularly in Vietnam.
Clonorchis sinensis ; Epidemiology

Background: Diseases due to parasites transmitted through food, including liver fluke and intestinal fluke a dangerous disease groups for people.\r\n', u'Objectives: to evaluate trematode infection situation in epidemic areas before providing drug to treat massively high-risk subjects.\r\n', u'Subjects and methods: A cross-sectional study was carried out in two communes of Nghia Hung district, Nam Dinh province to determine the trematode infection in human in August 2007. Families were randomly selected, and all of members of households were examined for trematode eggs by Kato-Katz technique. A total of 578 people, comprising 321 males (55.5%) and 257 females (44.5%) underwent stool examination. T\r\n', u'Results:120 (37.4%) males and 66 (25.7%) females were positive for small trematode eggs. There was a significant difference between males and females for infection rates with small trematode (X2 = 8.43; p < 0.05). The infection rate of trematodes was lowest in \u2264 20 age group and highest in >60 years old among both males and females. In the majority of the patients with small trematode eggs, the infection intensity was low: about 90.3% whereas 9.7% had moderate infection intensity. High intensity rate (>10.000 epg) was not found. \r\n', u'Conclusion: Trematode infection situation through food is still a healthy problem at investigated epidemic areas. \r\n', u'
Trematode infection ;