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目的分析广东省深圳市龙岗区流行性感冒(流感)监测的结果,掌握并初步预测流感流行趋势和病毒毒株变异情况。方法分析龙岗区2005-2007年流感流行病学、病原学、血清学监测资料,探索流感流行规律。结果2005年2月至2007年12月龙岗区上报流感样病例26644例,占监测就诊病例总数的5.30%(26644/503182);疾病主要集中在≤15岁年龄组(占83.17%);全年均有病例发生,5-9月发病数占62.70%(16707/26644);分离出流感病毒毒株20株,阳性率1.96%;其中A型16株和B型4株。3年共发生暴发疫情37起,累计发病例数605例;暴发时间多在3-6月,主要发生在中、小学校;病原学检测2005年、2007年以甲型流感病毒(73.33%)为主,2006年以乙型流感病毒(68.18%)为主。结论龙岗区2005-2007年流感发病相对平静,未发生较大规模的暴发流行,病毒毒株未发现明显变异。
Objective To analyze the results of influenza surveillance in Longgang District of Shenzhen City, Guangdong Province, and to predict and predict the trend of influenza epidemic and the variation of virus strains. Methods The data of influenza epidemiology, etiology and serology surveillance in Longgang District from 2005 to 2007 were analyzed to explore the epidemic pattern of influenza. Results A total of 26 644 flu-like cases were reported in Longgang District from February 2005 to December 2007, accounting for 5.30% (26644/503182) of the total number of cases monitored. The disease mainly concentrated in the age group of ≤15 (83.17%); All the cases occurred, and the incidence rate in May-September was 62.70% (16707/26644). Twenty strains of influenza virus were isolated, the positive rate was 1.96%. There were 16 strains of type A and 4 strains of type B. Outbreaks occurred in 37 cases in 3 years, with a cumulative incidence of 605 cases. The outbreak time ranged from March to June mostly in primary and secondary schools. Etiological testing In 2005 and 2007, influenza A (73.33%) was Lord, in 2006 to influenza B (68.18%) based. Conclusion The incidence of influenza in Longgang District was relatively calm during 2005-2007, and no outbreak of large-scale outbreak occurred. No obvious variation of virus strains was found.