中国H3N2亚型流感病毒烷胺类药物耐药性研究

目的 通过监测我国自1989年以来H3N2亚型流感病毒对烷胺类药物产生耐药性的情况,为流感的临床治疗用药提供一定的指导.方法 从我国流感监测网络中所分离的H3N2亚型流感病毒中随机选择了584株病毒,通过对病毒与烷胺类药物耐药性相关的M2基因进行序列测定,同时在细胞水平上通过药物敏感试验分析病毒对药物的敏感性,从而分析病毒产生耐药的情况.结果 1989-1999年没有发现对烷胺类药物产生耐药性病毒株,但2003年对烷胺类药物产生耐药性病毒株的比例从2002年的3.4%升到了56.0%,2005年达到77.6%.结论 自2003年以后,流行的H3N2亚型流感病毒超过50%的病毒产生了对烷胺类药物的耐药性,并且耐药病毒株的比例呈逐年升高的趋势.

Adamantane resistance among influenza A (H3N2) viruses isolated from the mainland of China

Objective To study the incidence of adamantine resistance among influenza A(H3N2) viruses isolated from the mainland of China since 1989 through our influenza surveillance system, and to provide more information for the clinical usage of adamantine drugs. Methods Totally 584 influenza A(H3N2) virus strains were randomly selected from our surveillance network since 1989, the adamantine drug resistance related gene M2 of all 584 strains was sequenced, and the drug sensitivity of viruses was also assayed by using biological methods in cells. Results No adamantine resistant strains were detected among the strains isolated from 1989 to 1999, but there was a surprisingly increased resistance rate of 56% in 2003 compared with 3.4% in 2002, and in 2005 the resistance rate increased to 77.6%. Conclusion Over 50% of virus among the strains isolated showed adamantine resistance since 2003, and the incidence rate is increasing.