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[目的]分析内蒙古地区流感病毒的变化情况,为制定防控措施提供科学依据。[方法]对2005年10月至2009年3月呼和浩特市和包头市6个哨点医院暴发疫情时采集流感样病例咽拭子标本进行流感病毒分离鉴定。[结果]2005~2009年合计采集流感样病例样本2 997份,分离流感病毒354株,阳性检出率为11.81%。分离的流感病毒毒株中,季节性A(H1N1)亚型207株,占58.47%;乙型147株(99株为Victoria系,48株为Yamagata系),占41.53%。其中,2005~2006年度季节性A(H1N1)亚型与B型同时存在,2006~2007年度、2008~2009年度都以季节性A(H1N1)为主要流行株,2007~2008年监测期间以B型为主要流行毒株。[结论]内蒙古地区2005~2009年流感主要流行毒株是季节性A(H1N1)亚型和乙型。
[Objective] To analyze the change of influenza virus in Inner Mongolia and provide a scientific basis for making prevention and control measures. [Methods] Throat swab samples from influenza-like cases were collected during influenza outbreaks in 6 sentinel hospitals in Hohhot and Baotou from October 2005 to March 2009 for influenza virus isolation and identification. [Results] A total of 2 997 influenza samples were collected from 2005 to 2009, and 354 influenza viruses were isolated, the positive detection rate was 11.81%. Of the isolated influenza virus strains, 207 (58.47%) were seasonal A (H1N1) subtypes; 147 strains were B (99 Victoria strains and 48 Yamagata strains), accounting for 41.53%. Among them, the seasonal A (H1N1) subtype and the B type coexist in 2005-2006, with seasonal A (H1N1) as the main epidemic strain in 2006-2007 and 2008-2009, with B Type as the main epidemic strains. [Conclusion] The main epidemic strains of influenza in Inner Mongolia from 2005 to 2009 were seasonal A (H1N1) subtype and B subtype.