【摘要】 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。更多还原

【Abstract】 8 strains were isolated from 40 specimens collected from suspected in·fluenza patients during November l993-February l994, and the isolated po, sitive rate was 45%, Of the l8 strains,14(77.8%)were influenza B viru,ses,and 4(22.2%)were influenza A (H3N2) viruses. The antigenicity of the new variantB/Hebei/11/94)was significantly different from that of national reference strain(B/Hufang/1/93),and the antigen ratio was ll.2。The positive rate of antibodies against the new variant(B/Hebei/11/94)in human sera was 68.1%, and the GMT(Geometric Mean Titer)was 72.2。The new variant-like viruses would not cause outbreak or epidemic in Bao一ding district recently if its antigenicity did not vary remarkably。更多还原