1997年 7月 18～ 2 7日 ,驻广西某部相继出现一批以发热、头痛为主要症状的病人。经流行病学调查、临床诊断和实验室检验 ,证实为一起水型伤寒的暴发。1　发病情况 　　 7月 18日 ,该部一营一连出现两名头痛、发热的战士 ,后陆续增多 ,至 2 7日 ,共出现 12例相似症状患者。病人 From July 18 to July 27, 1997, a batch of patients with fever and headache as the main symptoms successively appeared in a certain department in Guangxi. Epidemiological investigation, clinical diagnosis and laboratory tests confirmed an outbreak of water typhoid fever. 1 On July 18, two battalions with feverish fighters appeared in the first battalion of the ministry. Afterwards, they gradually increased. By the 27th, a total of 12 patients with similar symptoms appeared. patient