一起由水传播细菌性痢疾的调查

SURVEY OF AN OUTBREAK OF WATER-BORNE BACTERIAL DYSENTERY

为查清居民区发生的感染性腹泻暴发原因 ,进行了流行病学调查和细菌检验。结果 ,调查该区疑似病人 773人 ,确诊腹泻病为 172例 ,罹患率达 30 .1% ;病人集中在 3栋楼中 ,占发病总数的 6 5 .12 %。对饮用水检测发现 ,细菌总数为 110cfu/ml、总大肠菌群 >2 30mpn/L ,末梢水余氯为零 ;在 10份患者粪便中检出痢疾杆菌 5株。随即对自来水管道进行了检查维修 ,对生活饮用水加氯消毒 ,使疫情很快得到控制。此次感染性腹泻是一起由饮用水污染引起的细菌性痢疾暴发流行 ,调查提示必须加强对生活饮用水的消毒管理和卫生监测。

In order to find out the cause of an outbreak of infectious diarrhea occurring in residential area, epidemiological survey and bacterial examination were carried out. The results showed that there were 773 suspected cases and 172 cases with confirmed diagnosis of diarrhea in this area, with a morbidity rate of 30%. The patients were concentrated in 3 buildings, accounting for 65.12% of the total number of patients. Examination of the drinking water found that the total bacterial count was 110 cfu/ml, total coli-group was >230 mpn/L and the residual chlorine of the terminal water was zero. Five strains of Bacillus dysenteriae were detected in 10 stool specimens of the patients. Immediately after the survey, the tap water pipeline was examined and repaired and the drinking water was disinfected with chlorination. The epidemic was controlled quickly. This occurrence of infectious diarrhea was a fulminant epidemic of bacterial dysentery caused by contamination of drinking water. The survey suggests that the administration of disinfection and sanitary monitoring of drinking water should be strengthened.