Objective To investigate Zunyi C Class infectious diseases ,and provide basis for formulating prevention and control measures .Methods A network report of class C infectious diseasesfrom in Zunyi city from 2009 to 2012 was statistically analyzed by Excel software ,and data analysis was conducted by descriptive epidemiological method for .Results In Zunyi city from 2009 to 2013 reported a total of 8 kinds of class C infectious diseases (68 915 cases) ,annual report incidence rate was 213 .23/10 million;the top three are hand foot and mouth disease ,mumps and other infectious diarrhea ,accounted for 62 .22% of the total reported ca‐ses ,19 .68% and 13 .44% .There was slightly higher incidence rate of the disease from March to August and the main risks were in scattered children ,kindergarten children and students ;the age of onset lie in the population under 14 years old ,the male to female ratio was 1 .67∶1 .00 (χ2 =3 445 .64 ,P<0 .01) .Conclusion Hand foot and mouth disease ,mumps ,other infectious diarrhea and other infectious disease has become an important public health problem in Zunyi city .Therefore ,the kindergarten ,school infectious disease epidemic monitoring should be strengthened ,the infectious disease outbreaks should be reduced ,and communicable disease diagnosis and reporting standards ,which is helpful to improve the epidemic situation of infectious diseases research and prevention and control level should be improved to maintain the protection of public health .%目的：了解遵义市丙类传染病流行特征，为制定防控措施提供依据。方法对该市2009～2012年网络报告的丙类传染病数据，用Excel软件进行统计，运用描述流行病学方法对资料进行分析。结果该市2009～2013年共报告丙类传染病8种68915例，年均报告发病率为213．23／10万；居前3位的是手足口病、流行性腮腺炎和其他感染性腹泻，分别占报告病例总数的62．22％、19．68％和13．44％。以3～8月发病略高，发病以散居儿童、幼托儿童和学生为主，发病年龄以14岁以下人群为主，男女比为1．67∶1．00（χ2＝3445．64，P＜0．01）。结论手足口病、流行性腮腺炎、其他感染性腹泻等丙类传染病已成为遵义市重要的公共卫生问题。因此，加大对托幼机构、学校传染病疫情监测，减少传染病暴发流行，规范传染病诊断与报告，更有助于提高传染病疫情研判和防控水平，保障公众健康。
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