Fan Duo-zhi
Tianshui Municipal Center for Disease Control and Prevention, Tianshui 741000, Gansu, China.
Zhongguo Yi Miao He Mian Yi. 2009 Jun;15(3):233-5.
To observe epidemic status and the types of the influenza virus, to analyse influenza epidemic trends in Tianshui City, and to provide basis for influenza prevention and control.
Throat swab specimens of influenza cases in pilot hospitals and area of influenza-like a typical outbreak in Nov. 2005-Oct. 2008 was tested by chicken embryo and MDCK cells. The identification of the isolates was carried out by hemagglutination and hemagglutination inhibition test. The separation of strains were sent to the National Influenza Center to conduct a review appraisal.
1819 throat swab specimens of influenza-like were collected and 247 were isolated. Isolation rate was 13.58%. There were 36 strains (14.57%) of A (H1N1) subtype, 75 strains (30.36%) of A (H3N2) subtype and 136 (Victoria department 121, Yamagata department 15) strain (55.06%) of B subtype.
There were three epidemic types of influenza virus types-A (H1N1), A (H3N2) and B in Tianshui. Virus were epidemic at the same time or alternating at different intensity in different years. Outbreaks of influenza have occurred in rural primary and secondary schools, and B subtype was dominating.
观察流感病毒的流行状况及型别，分析天水市流感流行趋势，为流感防控提供依据。
对2005年11月至2008年10月试点医院流感病例及流感样典型暴发地区的咽拭子标本采用鸡胚和MDCK细胞进行检测。采用血凝试验和血凝抑制试验对分离株进行鉴定。将毒株送国家流感中心进行复核鉴定。
共采集1819份流感样咽拭子标本，分离出247株。分离率为13.58%。其中甲型（H1N1）亚型36株（14.57%），甲型（H3N2）亚型75株（30.36%），乙型136株（维多利亚系121株，山形系15株）（55.06%）。
天水市流感病毒有甲型（H1N1）、甲型（H3N2）和乙型三种流行型别。病毒在不同年份同时流行或交替以不同强度流行。农村中小学发生过流感暴发，且以乙型为主。
