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目的了解龙岩市2010年流感流行态势,为流感防治提供科学依据。方法对流感监测哨点医院及各县(市、区)疾控机构送检的1 223人份流感样病例咽拭样本以MDCK细胞进行流感病毒分离培养。结果检出流感病毒137株,阳性率11.2%。其中,甲型H1N1流感病毒3株,阳性率为0.2%;季节性流感病毒A3亚型流感病毒45株(3.7%),B型流感病毒89例(57.7%),未检出A1亚型流感病毒。龙岩市流感流行主要发生在1～3月及10～11月两个阶段。其中,1～8月以B型流感病毒流行为主,并存在B型yanagata系与B型victoria系流感病毒混合流行,流行强度相近。9月以后,突然转变为A3型流感病毒流行为主,流行强度也持续较高。流感病毒的感染无性别差异,但年龄特点显示以25～59岁为高发人群(43.8%),≥60岁人群感染率低。结论龙岩市流感防控应加强对季节性A1亚型流感病毒可能造成的流行或暴发及≥60岁人群的预防工作。
Objective To understand the prevalence of influenza in Longyan City in 2010 and provide a scientific basis for the prevention and treatment of influenza. Methods A total of 1 223 influenza-like swallowing samples from sentinel hospitals, counties (municipalities, district) and CDC sent to hospitals for influenza surveillance were isolated and cultured with MDCK cells. Results 137 strains of influenza virus were detected, the positive rate of 11.2%. Among them, 3 strains of influenza A (H1N1) virus were positive for 0.2%, 45 strains (3.7%) of seasonal influenza virus type A3 influenza virus and 89 cases (57.7%) of influenza B virus. No subtype A1 influenza was detected virus. Longyan influenza epidemic occurred mainly in January to March and 10 to November two stages. Among them, from January to August, the epidemic of influenza B virus was dominant, and there was a mixed epidemic of influenza virus type B yanagata and type B victoria, with similar prevalence intensity. After September, the sudden change to the A3 influenza virus epidemic, the prevalence of strength also continued higher. Influenza virus infection has no gender differences, but age characteristics show that 25 to 59-year-old population (43.8%), ≥ 60-year-old population infection rate is low. Conclusion The prevention and control of influenza in Longyan should strengthen the prevention and control of the epidemic or outbreak of seasonal A1 subtype influenza virus and the prevention of the crowd ≥60 years old.