武隆县万丰乡文凤村雷×1988年9月赴外地做工,10月28日出现发热、畏寒、腹泻、腹胀等症状,就诊县医院以“重感冒”治疗,6天后以自感好转为由出院。1989年1月25日办婚宴,宴后28天内参宴者中初发与雷×相似症状病人7例,经当地医院诊断为伤寒。7例初发患者发病后又8次设宴或再赴他人之宴,继而出现续发病例。至5月 Wenfeng Village, Wanfeng Township, Wulong County × Worked in the field in September 1988, with symptoms of fever, chills, diarrhea and abdominal distension on October 28th. The county hospital treated “heavy cold” and treated 6 days Improvement to discharge from hospital. On January 25, 1989, a wedding ceremony was held. In the 28 days after the feast, seven patients with similar symptoms were newly diagnosed in the feast for the first time and were diagnosed as typhoid fever by the local hospital. Seven cases of first-episode patients after the onset of another eight feast or go to another feast, followed by cases of recurrence. Until May