1986年6～10月,盐城市区发生一起伤寒暴发,发病607例,罹患率高达289.2/10万。发病主要在人口稠密、自来水供应集中的市区。四个主要街道罹患率分别高达474.61/10万、362.68/10万、358.16/10万、351.63/10万;而14个城郊村罹患率为171.61/10万。市区与城郊村罹患率有显著差异(p<0.01)。发病年龄最小6个月,最大66岁,15～29岁罹患率较高,尤其是20～24岁罹患率高达 From June to October 1986, an outbreak of typhoid fever occurred in Yancheng urban area, with a morbidity of 607 cases and an attack rate as high as 289.2 / 100000. The incidence is mainly in densely populated urban areas where tap water supply is concentrated. The prevalence rates of the four main streets were as high as 474.61 / 100000, 362.68 / 100000, 358.16 / 100000 and 351.63 / 100000 respectively; while the attack rate of the 14 suburban villages was 171.61 / 100000. There was a significant difference in attack rate between urban and suburban villages (p <0.01). The minimum age of onset of 6 months, maximum 66 years old, 15 to 29 years old suffering from a higher prevalence, especially 20 to 24-year-old attack rate as high as