Disruption of routine monitorization and chlorination of the water supply system during a week-long holiday led to a multi-organism gastroenteritis outbreak in a district with limited laboratory support. More than a 10-fold increase in patients with gastroenteritis was reported. Enteropathogenic Escherichia coli, Enteroaggregative E. coli, and norovirus were detected in human specimen samples. The main water tank and pipes were rusted; 13 out of the 19 water samples tested positive for total Coliform (1–920 colony-forming units (CFU)/100 ml) and E. coli (1–720 CFU/100 ml). Chlorine levels were below 0.2 ppm in seven of the nine samples. Information of 1,815 cases was obtained from the hospital records with a crude attack rate of 2.9%. Cases widespread in the district increased throughout the holiday, epidemic curve revealed a point-source outbreak. The case–control study revealed that consumption of drinking tap water and using it to clean vegetables/fruits were significantly associated with the illness. While drinking only bottled water had a protective effect against the illness. The culture technique showed that the water supply samples were positive for pathogenic bacteria. Upon decision in a multi-stakeholder meeting, the water tank was cleaned, and the Municipality initiated the renovation of the water supply system.

在为期一周的假期期间，供水系统的常规监测和氯化中断导致实验室支持有限的地区爆发了多微生物胃肠炎。据报道，肠胃炎患者增加了 10 倍以上。在人体样本样本中检测到致病性大肠杆菌、肠聚集性大肠杆菌和诺如病毒。主水箱和管道生锈；19 个水样中有 13 个检测出总大肠菌群（1-920 个菌落形成单位 (CFU)/100 ml）和大肠杆菌呈阳性(1–720 CFU/100 毫升)。九个样本中有七个的氯含量低于 0.2 ppm。从医院记录中获得了 1,815 例病例的信息，粗发病率为 2.9%。长假期间，区内普遍病例有所增加，疫情曲线呈点源暴发。病例对照研究表明，饮用自来水和用自来水清洗蔬菜/水果与疾病显着相关。虽然只喝瓶装水对疾病有保护作用。培养技术表明，供水样品的病原菌呈阳性。根据多方利益相关者会议的决定，对水箱进行了清洗，市政府启动了供水系统的改造。