Methods: Cases were analyzed by the epidemiological method, and feces of patients and eatery staff were detected by the Real-Time Fluorescent PCR.

• 方法：采用流行病学调查方法对病例进行调查，对病人以及食堂员工肛拭、粪便以及环境样品采用实时荧光PCR进行定性检测。