一起饮用水源污染引起的甲型副伤寒暴发疫情调查分析

目的了解杭州市郊某村2004年底发生的甲型副伤寒暴发疫情的流行病学特征及流行因素,为今后防治伤寒等肠道传染病提供依据。方法采用实地调查、采样检测及病例的流行病学个案调查。结果共发病186例,其中实验室确诊病人98例、临床诊断病例88例,罹患率为12.48%。水源水和末梢水水样检测显示饮用水受到严重的粪便污染。结论饮用水源污染为此次甲型副伤寒暴发的主要因素,应大力加强郊区和农村地区的改水改厕工作,杜绝此类事件的发生。

Investigation and analysis on an outbreak of paratyphoid A caused by contamination of drinking water resources

Objective The present investigation was designed to find out the epidemiological features and epidemic factors of paratyphoid A outbreak epidemic occurring at the end of 2004 in a village of the outskirts in Hangzhou City, provide the basic information for enteric infectious diseases, such as typhoid, prevention and control. Methods On-site inspection, sample collection and epidemiological investigation of cases were adopted. Results A total of 186 cases were affected in the outbreak with an incidence rate of 12.48%, diagnosis made in 98 cases through lab tests and in 88 ones clinically. It was showed by the monitoring of samples of water resources and pipe water that the drinking water was severely contaminated. Conclusion It is seen that drinking water contamination is a major factor contributing to the outbreak of paratyphoid A. So the improvement of water supply and toilet facilities should be vigorously strengthened for the avoidance of such occurrences.