Analysis of influenza surveillance of Harbin city from 2012 to 2016
XIAO Feng-juan;GUO Shu-zhen;LI Xu-ying;TANG Dao-zhou;ZHANG Gui-rong;Harbin Centre for Disease Control and Prevention;
Objective In order to understand the pathogenic characteristics and epidemic characteristics of influenza virus in Harbin in 2012-2016,so as to provide scientific basis for formulating effective prevention and control strategies.Methods Real-time PCR method was used to detect the nucleic acid of influenza virus in throat swab samples and outbreak samples collected from 2012-2016 cases in ILI and identify the type of influenza virus.Results 8 594 samples were detected in sentinel hospitals in 2012-2016,positive influenza virus nucleic acid was 645,positive rate was 7.20%; the ratio of positive samples in H1 N1,season H3,hepatitis was of 46.82%,35.66%,17.52%; the epidemic peak was mainly in the annual December to April in next year; 5-age group the positive rate of influenza the virus was highest,accounted for9.57%,the difference was statistically significant in each age group the positive rate of virus( χ2= 13.92,P 0.01). A total of 14 outbreaks of influenza were reported in 5 years. 159 samples were collected,83 were positive,the positive rate was52.20%,and the epidemic rate was 71.43% in spring. Conclusion Monitoring shows that influenza virus types present advantageous and virus types appeared alternately; the epidemic peak mainly concentrate in the winter season,in spring to offset the trend; children are the key population of influenza virus infection,the school is the main place of outbreak places.
【CateGory Index】： R511.7;R181.8