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本文报道了 1998年 10月和 1999年 4月 ,全军 10个监测地区进行了流感病毒抗体检测。结果显示 :甲 3亚型毒株抗体已达饱和水平。抗体阳性率高达 91% ,GMT(抗体平均滴度 ) 10 2 ,易感人群逐渐缩小至 9% ,这就迫使流感病毒发生抗原性变异 ,所以要警惕新的流行株出现。对甲1亚型毒株之间存在很大差异 ,尤其是对A 京防 53 97(H1N1)易感人群达 6 6 % ,这给该毒株的传播提供了有利条件 ,一但感染会引起局部流行。对乙型流感病毒抵抗力始终较低 ,易感人群占 50 % ,该毒株也易引起局部爆发流行。从GMT波动提示 1998年至 1999年春军队人群中同时流行H3N2亚型 ,H1N1亚型和乙型流感病毒均为局部流行 ,未引起大流行。
This article reports the detection of influenza virus antibodies in 10 surveillance areas throughout the army in October 1998 and April 1999. The results showed that the antibody of subtype A 3 had reached the saturation level. Antibodies positive rate of 91%, GMT (average antibody titer) 10 2, susceptible populations gradually reduced to 9%, which forced the antigenic mutation of influenza virus, so be alert to the emergence of new strains. There is a big difference between the T1 subtype A strains, especially for A637 (H1N1) susceptible population of up to 6 6%, which provides favorable conditions for the spread of the strain, but the infection can cause Local epidemic. The resistance to influenza B virus is always low, susceptible population accounts for 50%, the strain also easily lead to local outbreak epidemic. Fluctuations in the GMT prompted the simultaneous prevalence of the H3N2 subtype, the H1N1 subtype and the influenza B virus among the army forces from 1998 to 1999, both of which were endemic and did not cause a pandemic.