摘要
目的:观察天津市流感病毒流行特点以及流感样病例集体暴发和禽流感监测情况。方法:2004年10月-2007年3月3个冬春季的类流感样患者咽拭子标本采用MDCK细胞分离流感病毒,用红细胞凝集抑制试验(HI)进行型和亚型的鉴定。用RT-PCR方法检测2006年流感样病例暴发疫情发热患者咽拭子标本及2005~2006年不明原因肺炎病人呼吸道标本。结果:3个监测周期共采集类流感样患者咽拭子标本1696份,分离出流感毒株423株,总检出率为24.9%,其中A(H1N1)亚型39.0%(165/423株),A(H3N2)亚型35.0%(148/423株),B型26.0%(110/423株)。137份流感样病例暴发疫情咽拭子标本流感病毒RT-PCR检测,60份阳性,阳性率43.8%,其中A(H3N2)亚型35%(21/60),B型65%(39/60株),未检出A(H1N1)亚型。10起25份不明原因肺炎病人呼吸道标本流感病毒RT-PCR检测,其中检出1份A(H1N1)亚型,1份B型流感病毒,A(H5N1)均为阴性。结论:天津地区同时存在A(H1N1)、A(H3N2)和B型流感病毒。天津市2006年流感样病例暴发疫情3-4月均为B型,5-12月均为A(H3N2)亚型,2005~2006年未发现人禽流感病例。
Objective:To analyze influenza virus in Tianjin and survey influenza-like illness breakout and avian influenza epidemic situation. Methods:The influenza virus isolation was performed by MDCK cells from Oct. 2004 to Mar. 2007. The identification of the isolates was carried out with hemagglutination(HA) and hemagglutination inhibition(HI) tests. Influenza-like ill-ness breakout and avian influenza surveillance specimens in 2005-2006 were detected by RT-PCR. Results: A total of 1696 throat swab specimens from patients with influenza-like illness were collected in Tianjin among three surveillance periods, and 423 strains(24.9%) of influenza viruse were isolated. Data showed that there were 165 strains (39.0%) of A(H1N1) subtype, 148 strains(35.0%) of A(H3N2) subtype and 110 strains(26.0% ) of B type in these positive isolates. Among 137 influenza - like illness breakout surveillance specimens, 60(43.8%) influenza viruse strains were isolated. Among them, 21 strains (35.0%) were A(H3N2) subtype, 39strains(65.0% ) were B type. Avian influenza surveillance specimens were all A(H5N1) negative by RT-PCR method. Conclusion: There are three epidemic types of influenza viruses-A(H3N2), A(H1N1) and B type in Tianjin. Influenza-like illness breakout specimens in Mar. to Apr. of 2006 are of B type, while in May to Dec. are of A (H3N2). No H5 subtype human avian influenza is found in 2005-2006.
出处
《中国卫生检验杂志》
CAS
2007年第12期2278-2279,2361,共3页
Chinese Journal of Health Laboratory Technology