1992年8月至10月间,本县某单位发生一起以发热、头痛、腹泻、腹胀为主要症状的伤寒暴发流行。经调查报道如下:1 暴发情况:该单位有267人,1992年8月7日发生首例发热、腹泻、腹胀患者,经某卫生室初诊流感,经对症处理后,病情未见好转,而后又发生多例类似症状患者,计8月份5例、9月份10例、10月份11例共26例,罹患率 Between August and October 1992, an epidemic of typhoid fever, the main symptom of fever, headache, diarrhea and bloating, occurred in a unit in the county. The investigation reported as follows: 1 outbreak: The unit has 267 people, August 7, 1992 the first case of fever, diarrhea, abdominal distension, a new clinic by a flu, after symptomatic treatment, the disease did not improve, and then Occurrence of multiple cases of similar symptoms in patients, including 5 cases in August, 10 cases in September, 11 cases in October a total of 26 cases, the attack rate