论文部分内容阅读
本研究于１９９３年１１月至１９９４年２月采集疑似流感标本４０份，从中分离出流感病毒１８株，分离阳性率为４５％。其中乙型１４株占７７．８％，甲；型４株占２２，２％。乙型流感病毒新变种Ｂ／河北／１１／９４与国家代表株Ｂ／沪防／１／９３的抗原性变异明显，抗原比为１１．２。新变种Ｂ河北／１１／９４的人群血清抗体阳性率为６８．１％，几何平均滴度（ＧＭＴ）为７２．２。提示，如果新变种的抗原性不再发生明显变异，今后在保定地区该类毒株可能不引起暴发或流行。
In this study, 40 samples of suspected influenza were collected from November 1993 to February 1994, and 18 influenza viruses were isolated from them, the positive rate was 45%. Among them, 14 strains of B accounted for 77.8%, and 4 strains accounted for 22.2%. The antigenic variation of the new variant B / Hebei / 11/94 of influenza B virus and that of the national strain B / Shanghai defense / 1/93 was obvious, and the antigen ratio was 11.2. The seroprevalence of the new variant B Hebei / 11/94 was 68.1%, and the geometric mean titer (GMT) was 72.2. This suggests that in the future, such strains may not cause outbreaks or epidemics in the Baoding area in the future if the antigenicity of the new varieties no longer changes significantly.