佛山市1998-2008年流感监测结果分析

Analysis on the influenza surveillance results from 1998 to 2008 in Foshan

目的了解佛山市流感流行趋势及规律,为制定防控策略提供循证依据。方法收集1998-2008年流感监测资料进行描述性流行病学分析。结果 (1)1998-2003年间我市监测点所监测的呼吸道病例数占监测门诊就诊总人次35.38%,各年相对平稳。(2)2004-2008年间共监测流感样病例数占监测门诊就诊总人次的6.34%,呈逐年下降趋势。(3)11年间共分离出流感病毒740株,阳性率为14.45%,以A(H3)亚型为主。结论我市流感样病例(influenza like illness,ILI)发病有较明显的季节性,流感疫情高峰出现在5～8月,暴发疫情或聚集性病例主要集中发生在小学人群;流感流行优势毒株以A型流感病毒为主,历年疫情较为平稳。

Objective To understand the epidemiological trends and regulars of pandemic influenza in FoShan. Methods The influenza surveillance data from 1998 to 2008 were collected and analyzed by the descriptive epidemiological method. Results （1） From 1998 to 2003, the respiratory system disease cases accounted for 35.38% of the outpatients, and the umber of cases were relatively stable each year. （2） From 2004 to 2008, the influenza like illness （ILI） cases accounted for 6. 34% of outpatients, which decreased year by year. （3） A total of 740 strains of influenza viruses were isolated during the 11 years, and the positive rate was 14. 45%, which were mainly H3N2. Conclusions ILI have strong seasonal incidence in FoShan, and the peak of the outbreaks for ILI appeared from May to August. The predominately happened in primary population with Influenza A as the epidemic superiority virus, the outbreaks for ILI was relatively stable in past years.