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目的了解2011—2013年南宁市流行性感冒(流感)流行规律,为流感防控工作提供科学依据。方法用描述流行病学的方法分析2011—2013年南宁市流感样病例(ILI)的流行病学特点,病原学检测和突发疫情等,探索流感流行规律。结果 2011—2013年南宁市医院ILI分别占门诊就诊总病例的20.07%、27.72%和6.51%,2011—2013年共采集3 356份流感样病例咽拭子标本,流感病毒核酸阳性490份,阳性率39.11%。2011年的流行株为新甲型H1N1,2012年为B型和A型(H3N2),2013年又以新甲型H1N1和B型为主,3种类型交替出现。13起流感突发疫情均是学校,以2012年最多(发生6起);0~4和5~10岁发病率分别为66.56%和29.06%;中学暴发起数占疫情总数的85.52%;B型流感病毒导致的突发疫情占8起,A型(H3N2)3起,新甲型H1N1有2起。结论 2012年出现流感发病高峰。3年中病毒以新甲型H1N1、A型(H3N2)和B型为主,3种类型交替占优势,流感暴发主要发生于中小学和幼儿。
Objective To understand the prevalence of influenza (influenza) in Nanning City from 2011 to 2013 and provide a scientific basis for prevention and control of influenza. Methods Descriptive epidemiological methods were used to analyze the epidemiological characteristics, pathogenicity tests and outbreaks of influenza-like illness (ILI) from 2011 to 2013 in Nanning to explore the epidemic pattern of influenza. Results From 2011 to 2013, ILI in Nanning City Hospital accounted for 20.07%, 27.72% and 6.11% of the total outpatient visits respectively. From 2011 to 2013, a total of 3 356 throat swab samples of influenza-like illness were collected, and influenza virus nucleic acid positive 490 were positive Rate of 39.11%. The epidemic strains in 2011 were new type A H1N1, type B and type A (H3N2) in 2012 and new type A H1N1 and type B in 2013, with three types alternating. Thirteen influenza outbreaks were in schools, with the most in 2012 (6 occurrences); the incidence rates of 0 ~ 4 and 5 ~ 10 years old were 66.56% and 29.06% respectively; the number of outbreaks in secondary schools accounted for 85.52% of the total outbreaks; B Influenza virus caused by the epidemic accounted for 8 cases, A (H3N2) 3, the new H1N1 2 cases. Conclusion The peak of influenza incidence occurred in 2012. Three years the virus to new type A H1N1, type A (H3N2) and type B, the three types of alternating predominance, the flu outbreak occurred mainly in primary and secondary schools and young children.