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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,为制定流感预防控制策略提供参考。方法分析龙岗区2010—2011年流感样病例的流行病学、病原学检测、职业暴露人群人禽流感血清学监测等资料,探索流感流行规律。结果 2010—2011年龙岗区监测流感样病例55 429例,占监测就诊病例总数的7.24%(55 429/765 910);流感样病例主要集中在≤15岁年龄组,占80.55%;全年均有病例发生。两年间共分离出流感病毒毒株312株,阳性率38.61%(312/808);其中季节性流感A型96株,B型113株,甲型H1N1流感103株。两年共发生流感暴发疫情43起,累计发病例数458例;暴发时间多在3—5和12月,占总暴发疫情总数的83.72%,流感暴发疫情全部发生在学校和托幼机构;2010年暴发疫情主要为B型流感病毒(94.44%),2011年暴发疫情仍以B型流感病毒(76.00%)为主。结论龙岗区2010—2011年季节性流感发病相对平静,未发生较大规模的暴发流行,病毒毒株未发生明显变异。
Objective To analyze the results of influenza (influenza) surveillance in Longgang District, Shenzhen City, Guangdong Province, and provide a reference for the development of influenza prevention and control strategies. Methods The epidemiology and pathogenicity of influenza-like cases from 2010 to 2011 in Longgang District were analyzed, and the serological surveillance of human bird flu in those exposed to occupational exposure were also explored to explore the epidemic pattern of influenza. Results A total of 55 429 flu-like cases were detected in Longgang district in 2010-2011, accounting for 7.24% (55 429/765 910) of the total number of cases monitored. Influenza-like cases mainly concentrated in the age group ≤15, accounting for 80.55% A case occurred. A total of 312 influenza virus isolates were isolated in two years, with a positive rate of 38.61% (312/808). Among them, 96 strains were seasonal influenza A, 113 were B and 113 were influenza A (H1N1). In two years, there were 43 outbreaks of influenza outbreaks, with a cumulative incidence of 458 cases; the outbreaks were mostly in 3-5 and 12 months, accounting for 83.72% of the total outbreaks. The influenza outbreaks all occurred in schools and kindergartens; The annual outbreak was mainly influenza B (94.44%). In 2011, the outbreak was still mainly influenza B (76.00%). Conclusion The incidence of seasonal flu in Longgang District was relatively calm from 2010 to 2011, with no outbreak of large-scale outbreak and no significant variation of virus strains.