云南省地方性猝死病区天气因素与饮用水生物性污染相关性分析

Correlation analysis between weather factors and biological pollution of drinking water in Yunnan endemic sudden death area

目的调查云南省地方性猝死病区饮用水卫生学指标及天气情况,分析天气状况对饮用水水质的影响,进而研究用天气状况作为云南省地方性猝死病情症候群监测指标的可行性。方法连续监测了3个重病区的水质卫生状况及其同期天气情况。以细菌总数和总大肠埃希菌群值超标率和超标程度评价饮用水的微生物污染状况,并对天气状况和水质卫生状况之间的相关性进行统计学分析。结果总体上饮用水细菌总数超标率为72.1%,总大肠埃希菌群值超标率为97.4%。日照情况与水样的总大肠埃希菌群值呈负相关(r=-0.42,P<0.05或r=-0.36,P<0.05),温度与水样的总大肠埃希菌群值呈正相关(r=0.39,P<0.05或r=0.40,P<0.05)。结论病区居民的饮用水污染程度相当严重,且受天气变化影响较大。饮用水的卫生状况与温度等气象因素相关。

Objective To study the probability of using the weather condition as a signal to detect the outbreak of Yunnan endemic sudden cardiac death （YESCD） by determining the hygienic index of drinking water sampled from YESCD area as w.ell as investigating the weather condition and analyzing its influence. Methods Drinking water and weather condition were continually surveyed in three YESCD areas. Total bacterial and coliform bailli were counted to evaluate the microbial contamination in drinking water, menawhile the correlation between hygienic condition of drinking water and weather condition was analyzed. Results 72.1% of the samples of drinking water exceeded the standard of the total bacterial count, 97.4% samples exceeded the standard of coliform bacilli count. Coliform bacilli count was negatively correlated with the sunshine time（r = - 0.42,P 〈 0.05 or r = - 0.36, P 〈 0.05 ）. and positively with the temperature （r = 0.40,P 〈 0.05 or r = 0.39 ,P 〈 0.05 ）. Conclusions Drinking water in YESCD area has been badly contaminated and obviously influenced by weather condition. The correlation between the hygienic condition of the drink water and temperature is statistically significant.