2005-2006年湛江市流感监测和暴发疫情分析

[目的]探讨湛江市流感流行规律，以做好流感预防控制工作。[方法]通过流感监测系统和法定传染病监测系统，对湛江市2005-2006年流感进行流行病学、病原学、血清学监测。[结果]2005-2006年流感监测点流感样病例分别为9375和10086例，分别占门诊总病例数的10．1％和5．8％。发生13起流感暴发，发病190例，分离到103株流感病毒。其中，2005年上半年以H3N2亚型为优势毒株（21株），下半年B型为优势毒株（18株）；2006年以H1N1为优势毒株（54株）。正常人群流感流行株抗体的总阳性率为1．0％～86．0％。[结论]不同型别的毒株表现出交替占优势的特征，人群流感抗体水平的消长与优势株的型别一致。

Analysis of the Epidemic of Influenza Surveillance and Outbreak in Zhanjiang from 2005 to 2006

[Objective]To explore the epidemic regularity of influenza in Zhanjiang city, provide scientific basis for influenza prevention and control. [Methods]Epidemiologieal ,etiological and serological surveillance of influenza from 2005 to 2006 was conducted based on influenza surveillance system and notifiable infectious disease surveillance system. [Results] 9 375 and l0 086 cases with the infection of respiratory system were reported from 2005 to 2006, accounting for 10.1 and 5.8 % of the total cases. Of the 13 outbreaks, 190 cases were reported. 103 influenza viruses were isolated, of which subtype H3N2 was the main type virus in the first half of 2005（21） and type B was the main type in the second half of the year （18）. While H1N1 was the main type in 2006（54）. The overall positive rate of antibody against influenza of influenza epidemic strain among healthy population was from 1.0 % to 86.0 %. [Conclusion]Different types of strains predominated alternatively,the rise and fall of influenza antibody level among people conformed to the type of dominant strain.