Surveillance of intestinal infection befor and after water storage of Three Gorges reservoir in Xingshan county, Hubei province

Objective To understand the disease trend of intestinal infection before and after the water storage of Three Gorges reservoir. Methods Longitudinal epidemiological study was condcuted to analyze the incidence of intestinal infection from 2000 to 2010 and the surveillances on diarrheal diseases (mainly on cholera), environmental sewage, food, water, aquatic products, drinking water were conducted. Results Three kinds of intestinal infection in class B communicable diseases were detected, the average annual incidence was 19.50/lakh, a decline of 59.02% compared with 2000; the incidence rate of 2 kinds of intestinal infection in calss C communicable disease was 52.39/lakh. A total of 2085 samples were tested. One strain of Shigella flexneri was detected, the positive rate was 0.05%. The qualified rates of physical and chemical indicators of various source water were all 100.00%; the qualified rate of bacterial indicator of drinking water was all 100.00% in urban area and 65.00% in rural area. Conclusion Intestinal infection epidemic may not occur directly as the result of the water storage of Three Gorges reservoir in Xingshan, but the management of drinking water in rural area should still be strengthened.