1994年4月下旬，衡阳市城北区某校陆续出现高热病人，经流行病学调查，证实为伤寒水型暴发流行，现将结果报告如下。1流行特征1994年4月22日，衡阳市北郊某专科学校出现首例高热，畏寒病人，至5月14日止共发病58例，发病率为4．83％（58／1200），无死亡病例。患者均为学生。男 In late April 1994, a school of high fever in a school in the north of Hengyang City appeared one after another with high fever. After epidemiological investigation, it was confirmed that it was epidemic of typhoid fever. The results are reported as follows. 1 epidemic characteristics April 22, 1994, Hengyang City, a college in the northern suburbs of the first cases of fever, chills, 58 cases of onset until May 14, the incidence was 4.83% (58/1200) No deaths. Patients are students. male