云浮市城市污水中沙门菌调查

目的 了解宾馆和饭店污水中沙门菌污染状况。方法 于2003年1-6月采集宾馆和饭店的327件污水样以及部分居民生活区的176件污水样按国家标准检验方法检测沙门菌。结果 宾馆和饭店污水沙门菌阳性率(3．67％)高于居民生活区(0.57％)，经确切概率法检验，P=0．04，差异有统计学意义。宾馆和饭店污水检出沙门菌阳性的有12件，共12株菌，共有4个血清群，9个血清型；居民生活区污水检出沙门菌阳性的有1件，菌株是B群鼠伤寒型沙门菌。宾馆和饭店的327件污水水样中，1—3月沙门菌阳性率(5．47％)高于4-6月(0．79％)，经确切概率法检验，P=-0．033，差异有统计学意义。结论 云浮市区内宾馆和饭店污水中沙门菌的污染及其对人潜在的致病危险性应引起重视。

Investigation on Salmonella typhi in Sewage of Urban Area of Yunfu

Objective To explore the contamination of sewage from hotels and restaurants by Salmonella typhi. Methods 327 sewage samples collected from hotels and restaurants and 176 sewage samples collected from some residential area were detected for Salmonella typhi based on the national standard methods. Results The positive rate of Salmonella typhi in the sewage samples from hotels and restaurants (3.67%) was significantly higher than that from residential area(0.57%), P=0.04(exact probability test).12 strains of Salmonella typhi belonging to 4 sero-groups and 9 serotypes were found in 12 sewage samples collected from hotels and restaurants.One strain of Salmonella typhimurium was only found in one sewage sample collected from residential area. The positive rate of Salmonella typhi in the sewage samples collected during January-March (5.47%) was significantly higher than that during April-June(0.79%) among total 327 sewage samples collected from hotels and restaurants, P=0.033(exact probability test). Conclusion The contamination of sewage from hotels and restaurants by Salmonella typhi and its potential risk to human health should be paid more attention to.