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目的了解福田区流行性感冒(简称流感)流行动态及流感病毒毒株的变异情况,为流感的防治提供科学依据。方法每周统计监测点流感样病例(ILI)数据,采集流感样病例鼻咽拭子标本,采用MDCK细胞进行流感病毒分离,采用血凝抑制试验进行流感病毒型别的鉴定。结果 2007—2009年共监测到流感样病例32 961例,占监测门诊总数的5.61%;分离阳性毒株363份,分离率34.41%。各年度ILI%趋势与病毒分离率一致。发生暴发疫情97宗,主要发生在中小学和托幼机构。结论福田区流感流行高峰在6—8月,各亚型交替出现,一般在6月前后出现毒株型别改变。2009年ILI%、分离率及暴发疫情的升高主要是由于甲型H1N1流感大流行引起的。
Objective To understand the prevalence of influenza in Futian District and the variation of influenza virus strains and provide a scientific basis for the prevention and treatment of influenza. Methods Influenza-like illness (ILI) data were collected every week. Samples of nasopharyngeal swabs from influenza-like cases were collected. MDCK cells were used for influenza virus isolation. The type of influenza virus was identified by hemagglutination inhibition test. Results A total of 32 961 flu-like cases were detected in 2007-2009, accounting for 5.61% of the total number of outpatient clinics. 363 isolates were positive, with a separation rate of 34.41%. The trend of ILI% in each year is consistent with the virus isolation rate. Outbreaks occurred in 97 cases, mainly in primary and secondary schools and nurseries. Conclusion The epidemic peak of epidemic in Futian District was from June to August, and all the subtypes appeared alternately. Generally, there was a change of virus type before and after June. The rise of ILI%, separation rate and outbreak in 2009 was mainly attributed to the Influenza A (H1N1) pandemic.