安徽省淮南市2012-2013年流感病毒细胞分离及其流行特征分析

目的：观察安徽省淮南市2012-2013年流感病毒细胞培养分离结果，研究淮南市流感流行特征，为该市流感防控提供科学依据。方法实时荧光定量PCR法对哨点医院送检咽拭子标本进行核酸快速分型后采用狗肾（ MDCK）传代细胞培养法分离病毒，红细胞凝集试验（ HA）鉴定病毒滴度，红细胞凝集抑制试验（ HI）进行型和亚型的鉴定。结果从148份流感网络实验室实时定量PCR阳性标本中，分离出流感毒株68株，总分离率45．9％，其中 A1（H1N1）型26株，分离成功率56．5％，A3（H3N2）型25株，分离成功率33.3％；BY型4株，BV型13株，B型毒株分离成功率为63．0％；各型毒株的分离成功率差异有统计学意义（P＜0．05）。2012年淮南市流行株为BV型流感病毒，于3月份达到流行高峰；2013年流行株为A（H1N1）型流感病毒，流行高峰期则是12月份。结论淮南市2012-2013年甲型流感病毒抗原的变异性强；细胞培养分离病毒对流感流行的病原鉴定起决定性作用；流感病毒B型毒株和新A（H1N1）型毒株分离成功率较高。

Analysis epidemiological characteristics of influenza virus isolated and identified cell in Huainan of Anhui Province from 2012-2013

Objective To reveal the epidemic characteristics of influenza in Huainan of Anhui Province and provide scientific basis for prevention and control of influenza surveillance by summarizing the work of influenza virus isolation performed in 2012-2013.Methods First nucleic acid fast typing by real-time PCR method for sentinel hospitals in throat swab specimens for inspection from sentinel hospital ,the influenza virus isolation was performed by using MDCK cells and the identification of the isolates was carried out by hemagglutination （ HA） and hemagglutination inhibition（HI） tests.Results 68 strains of influenza virus were isolated （45.9%） from 148 of positive specimens detected by fluorescent quantitative real-time PCR.The number of subtype A（H1N1）,A（H3N2）,BY and BV were 26 strains,25 strains,4 strains and 13 strains,respectively,the success rate of the separation were 56.5%,33.3%, 63.0%,respectively.There were significant difference among the separation of the strain rate of success （P〈0.05）. 2012 epidemic strain in Huainan was influenza BV virus ,and reached epidemic peak in March;2013 epidemic strain was A（H1N1）influenza virus,the epidemic peak was December.Conclusion During the period of influenza surveillance in Huainan,the main subtype of influenza of the year 2012 is BV which reached epidemic peak in March , while subtype A（H1N1） is the main subtype of the year 2013,with the epidemic peak month December .