2005年贵州省流行性感冒监测结果分析

An Analysis on Influenza Surveillance Results of Guizhou Province in 2005

目的：了解2005年贵州省人群中流行性感冒流行的趋势及病毒型别，及时发现新的变异毒株，为流感防治提供科学依据。方法：选择哨点医院进行流感的流行病学和病原学监测，采用鸡胚和MDCK细胞培养，进行病毒分离，用血凝抑制试验进行型和亚型鉴定，同时开展全省疫情监测。结果：2005年检测1054份标本，分离阳性病毒株56株（其中监测点标本24株，疫情标本32株），分离的病毒型别主要是甲1型42株，甲3型7株，乙型6株，有1株未定型。结论：2005年贵州省流感流行的高峰在3～4月和10～12月，有甲1、甲3及乙型流感病毒，但以甲1型流感病毒较为活跃。

Objective： To study the types of influenza viruses in Guizhou population and its epidemic tendency, and to find out new mutant strain, if there was any, in the early stage, in order to provide scientific basis for its control and prevention. Methods： Epidemiology and etiology surveillance of influenza was conducted in selected sentry hospitals. The state of influenza-like illness in all over Guizhou province was monitored closely. Strains of influenza viruses were isolated and cultured with chick embryo and MDCK cells. Results： Fifty-six strains of influenza virus were isolated from 1054 specimens collected in 2005, which were classified to types and subtypes according to HI test results. Of the 56 strains, 42 strains were of type A1, 7 strains of A3, 6 strains of B, and 1 strain of unclear type. Conclusion： Top peaks of influenza epidemic occurred during Match-April and October-December in 2005. The virus strains caused these included type A1, A3, and B, and the strain of type A1 was the most active one.