Epidemiological analysis of intestinal infectious diseases in Jiangshan county of Zhejiang province, 2004-2007

Objective 　To investigate the epidemic trend and features of intestinal infectious diseases in Jiangshan city in recent years, and provide evidence for the development of strategy for effective prevention and control of intestinal infection. Methods　The descriptive epidemiological method was employed to statistically analyze the epidemic data of intestinal notifiable infectious diseases and death reports in Jiangshan city from 2004 to 2007. Results　A total 1639 cases of 8 intestinal infectious diseases were reported during the past four years with an average annual incidence rate of 82.77/lakh, accounting for 16.97% of the total cases of notifiable infectious diseases. No death case was reported. Though the incidence of bacillary dysentery and paratyphoid varied greatly, the incidence of hepatitis A, hepatitis E, hepatitis (unspecified), amebic dysentery and typhoid remained stable, and the incidence of other infectious diarrhea increased year by year. A total of 1075 male cases and 564 female cases were reported with the gender ratio of 1.91∶1. The cases in age group 0-5 years (691 cases) and age group 15-49 years (559 cases) accounted for 42.16% and 34.11%, respectively, of the total cases. As for the population distribution, scattered and preschool children (44.91%), farmers (26.85%) and students (12.08%) comprised the major affected group. The onset peaks were seen in summer and fall. Conclusion The incidence of intestinal infectious diseases was low in Jiangshan city, though an increasing trend was observed with highly scattered and spot-outbreak characteristics. The comprehensive prevention and control of intestinal infectious disease should be further strengthened and the prevalence of other infectious diarrhea should be monitored.