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叶城县是常发生伤寒流行的地区之一 ,2 0年来已发生过多起伤寒暴发流行 ,给当地群众造成了很大的经济损失。 2 0 0 1年 3月 2 4日至 6月 1日 ,发生了一起伤寒暴发流行 ,发病人数为 2 2 8例 ,发病率达 63 3 1 0万 ,经调查和积极实施预防措施 ,使疫情得以控制。现将调查分析结果?
Yecheng County is one of the areas where typhoid fever often occurs. Too many typhoid outbreaks have occurred in 20 years and caused great economic losses to local people. An epidemic of typhoid fever occurred from March 24 to June 1, 2001. The number of cases was 228, with a prevalence of 63 31 million. After investigation and active implementation of preventive measures, the epidemic situation Controlled. Now the investigation and analysis of the results?