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目的 分析2013-2015年毕节市流感病毒的流行情况,了解感病毒的流行特点及其优势株的情况变化特点.方法 收集毕节市流感监测哨点的流感样病例数、就诊人数等数据进行描述性流行病学分析;对采集的流感样病例咽拭子标本进行流感病毒分型,鉴定流感病毒型和亚型.结果 毕节市2013-2015年共监测到流感样病例941例,流感样病例就诊比例平均为076%,ILI%均值呈逐年下降的趋势.ILI主要分布于低龄人群,其中0~4岁年龄段为主,15~24岁年龄组和60岁及以上年龄组较少,ILI构成比在不同年龄组的分布具有统计学差异(P<005).共分离到各型流感病毒184株,总阳性率为2040%.结论 季节性流感流行的优势毒株在各年度各亚型株之间呈交替变化趋势.通过对毕节市流感病毒的病原学和流行病学监测,能及时发现当地流感的流行特点和流感病毒的变异趋势.
Objective To analyze the epidemic situation of influenza virus in Bijie City from 2013 to 2015 and to find out the prevalence of influenza virus and changes in the characteristics of its dominant strains.Methods The data of influenza-like illness and number of visits were collected from the influenza surveillance sentinel sites in Bijie City. Epidemiological analysis was carried out.Analyzing the influenza virus type and identifying the influenza type and subtype in the collected samples of throat swab.Results 941 flu-like cases were detected in 2013-2015 in Bijie City, and the proportion of flu-like cases The mean of ILI% showed a trend of declining year by year.ILI mainly distributed in younger age groups, of which 0 ~ 4 age group, 15 ~ 24 age group and less than 60 years old age group, ILI composition ratio There were statistically significant differences in distribution among different age groups (P <0.05) .A total of 184 strains of influenza viruses were isolated with a total positive rate of 2040% .Conclusion The predominant strains of seasonal influenza are in different subtypes Between the trend of alternating changes.By the Bijie influenza virus etiology and epidemiological monitoring, can be found in time the prevalence of influenza and influenza virus trends.