论文部分内容阅读
目的分析广州市2012―2016年流感样病例暴发疫情的流行特征,为制定防控策略提供依据。方法通过中国流感监测信息系统和突发公共卫生事件管理信息系统收集2012―2016年广州市12个区报告的流感样病例暴发疫情及突发公共卫生事件相关信息资料,采用描述流行病学方法对暴发疫情的三间分布特征进行分析。结果 2012―2016年广州市共报告流感样病例暴发疫情229起,疫情主要集中在3―6月(179起,占78.16%)。全市12个区均有疫情报告,其中报告疫情起数超过20起的区有花都区(39起)、增城区(32起)、天河区(27起)、黄埔区(25起)、萝岗区(22起)和白云区(21起),合计占报告疫情总起数的72.49%。暴发疫情主要集中在小学(163起,占71.18%),其次为中学(37起,占16.16%)和幼儿园(12起,占5.24%)。病原学检测结果显示,B型占48.91%,A(H3N2)型占24.02%,A、B混合感染占9.61%,A(H1N1)pdm09型占6.99%,未分型占10.48%。疫情持续时间与首发病例至介入疫情时间呈正相关,相关系数为0.23(P<0.01)。结论 2012―2016年广州市流感样病例暴发疫情主要集中在3―6月,中小学校及幼儿园是高发场所,B型及H3N2型流感病毒为该市流感流行的优势毒株。
Objective To analyze the epidemiological characteristics of influenza-like outbreaks in Guangzhou City from 2012 to 2016 and provide the basis for the development of prevention and control strategies. Methods Through the China Influenza Surveillance Information System and the Public Health Emergency Management Information System, we collected information on the outbreaks of influenza-like illness and public health emergencies reported in 12 districts of Guangzhou from 2012 to 2016. The epidemiological methods Outbreaks of the three distribution characteristics were analyzed. Results A total of 229 cases of influenza-like outbreaks were reported in Guangzhou during 2012-2016. The outbreaks were mainly in the period from March to June (179 cases, 78.16%). There are epidemic reports in 12 districts of the city, including Huadu District (39), Zengcheng District (32), Tianhe District (27), Huangpu District (25), (22 districts) and Baiyun District (21 districts), accounting for 72.49% of the total number of reported outbreaks. Outbreaks were mainly in primary schools (163, accounting for 71.18%), followed by secondary (37, accounting for 16.16%) and kindergartens (12, accounting for 5.24%). The results of pathogenic tests showed that B (48.91%), A (H3N2) accounted for 24.02%, A and B mixed infections accounted for 9.61%, A (H1N1) pdm09 accounted for 6.99% and undifferentiated 10.48%. The duration of the outbreak was positively correlated with the time from the first incident to the time of the outbreak, with a correlation coefficient of 0.23 (P <0.01). Conclusion In 2012-2016, the outbreak of influenza-like illness in Guangzhou mainly concentrated in March to June. Primary and secondary schools and kindergartens were the high incidence sites. Type B and H3N2 influenza viruses were the predominant strains of influenza in the city.