人民网北京12月15日电 （记者乔业琼）据无锡疾控微信公众号消息，诺如病毒感染是一种常见的 肠道传染病。该病毒感染性很强，较低剂量就可引起感染。每年10月到次年3月是诺如病毒感染高发季 节，学校和托幼机构等人群聚集场所是诺如病毒感染疫情高发场所。 诺如病毒是引起成人和儿童急性胃肠炎的重要病原体，感染潜伏期为12-72小时，通常为24-48小 时。具有高传染性、低剂量致病的特点。 这种病毒的 "生命力" 也十分顽强：在低温环境下可存活数周，普通酒精消毒对它无效，甚至在粪 便中也能存活数天至数周。更麻烦的是，诺如病毒有多种基因型，且容易发生变异，即使之前感染过， 也可能再次中招。 传播途径多样 诺如病毒的传播途径有以下几种，日常防护时需要重点关注： 粪——口传播：这是最主要的传播方式。接触了被患者粪便或呕吐物污染的物品、食物或水，再经 手入口。 接触传播：直接接触患者或其排泄物、呕吐物，或接触被污染的物体表面（如门把手、玩具、水龙 头等）。 气溶胶传播：这是诺如病毒在集体场所暴发的关键原因。患者呕吐或腹泻时，产生的带病毒飞沫可 悬浮在空气中，被他人吸入后引起感染。 食源性传播：食用或饮用被病毒污染的食物（如贝类、 ...

Core Points - A public health incident occurred at Shenyang Normal University, with 2,087 students reporting gastrointestinal symptoms, primarily due to norovirus contamination from a self-supplied water well [1] - The outbreak has peaked, with a significant decline in new cases, reporting only 25 new cases from September 6 to September 7 [1] - Health authorities have implemented a level III public health emergency response, conducting disinfection and epidemiological investigations to identify the source of infection [1] Group 1 - The total number of students with gastrointestinal symptoms reported is 2,087, with 1,817 having recovered and 270 currently experiencing mild symptoms [1] - The outbreak was traced back to contamination in the university's third living area water supply, leading to the closure and control of the affected well [1] - The university is coordinating with water supply departments to ensure safe drinking water for students and is initiating municipal water supply connection projects [1] Group 2 - Norovirus is a common pathogen causing acute gastroenteritis, characterized by low infectious dose and strong environmental resistance, making it prone to outbreaks in closed environments like schools [2] - Symptoms of norovirus infection include nausea, vomiting, fever, abdominal pain, and diarrhea, with children primarily experiencing vomiting and adults more likely to have diarrhea [2] - Preventive measures include maintaining hand hygiene, ensuring food and water safety, isolating infected individuals, cleaning and disinfecting environments, and promoting healthy lifestyle practices [2]