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目的了解2006-2007年云南省红河州流行性感冒(流感)的流行特点,探讨优势株的变化。方法采集疑似流感患者咽拭子,接种于MDCK细胞于34℃CO2培养箱内进行病毒分离,培养液进行血凝试验,阳性标本进行分型鉴定。结果全年哨点医院共采集咽拭子标本991份,分离得到123株流感病毒,阳性率12.4%,其中H1N1 37株,H3N2 41株,Victoria 42株,Yamagata 1株,待定2株。各县(市)疾病预防控制中心采集疑似流感患者咽拭子56份,分离得到39株流感病毒,阳性率69.6%。均为B型Victoria系流感病毒。结论在2006-2007年监测年度中,2006年3-6月以B型Victoria系毒株为主,2006年7-9月以H1N1为主,2007年1-3月以H3N2为主。疑似流感疫情均为B型Victoria系。
Objective To understand the epidemic characteristics of influenza (influenza) in Honghe Prefecture of Yunnan Province during 2006-2007 and to explore the changes of dominant strains. Methods Throat swabs were collected from suspected influenza patients and inoculated into MDCK cells for virus isolation at 34 ℃ CO2 incubator. The culture fluid was tested for hemagglutination and the positive samples were identified by typing. Results A total of 991 throat swabs were collected from sentinel hospitals in the year. 123 influenza viruses were isolated and the positive rate was 12.4%. There were 37 H1N1 strains, 41 H3N2 strains, 42 Victoria strains and 1 Yamagata strain. In all counties (cities), CDC collected 56 pharyngeal swabs from suspected influenza patients and isolated 39 influenza viruses, the positive rate was 69.6%. All are type B Victoria strains of influenza virus. Conclusions In the monitoring year of 2006-2007, the type B Victoria strain was mainly from March to June 2006, mainly from H1N1 from July to September in 2006, and H3N2 from January to March in 2007. Suspected influenza outbreaks are type B Victoria Department.