2010-2015年咸阳市流感监测结果分析

Analysis of influenza surveillance Results in Xianyang From 2010 to 2015

目的了解2010-2015年咸阳市流行性感冒流行情况,为流感防控工作提供依据。方法采用PCR方法进行流感病毒核酸检测及分型,利用狗肾细胞(MDCK cell)分离流感病毒毒株,对全市2010-2015年哨点医院采集的流感样病例(ILI)监测数据、病原学监测结果进行分析。结果 2010-2015年全市共报告ILI 13 962例,平均ILI%为2.29%,各年龄组分布情况为0~4岁年龄组病例最多,达到37.07%,60~年龄组最少为9.92%,哨点医院采集标本5 413份,阳性744份,阳性率13.74%,幼托儿童、学生、散居儿童阳性数居前3位,各年的流行株不同,呈现交替流行。共发生暴发疫情3起,均在学校。结论咸阳市流感监测结果情况良好,流感流行季节为冬春季,儿童、学生和老人是防控重点对象,应根据每年流行株不同布置防控工作,每年9~10月及时接种疫苗。

Objective To understand the epidemic situation of influenza in 2010 to 2015 in Xianyang, and provide evidence for the prevention and control of influenza. Methods Influenza virus nucleic assay and typing were performed by PCR, and strains of influenza virus were isolated using MDCK cells. Surveillance data and etiological surveillance results of influenza -like illness （ILI） from sentinel hospitals in Xanyang during 2010 to 2015 were analyzed. Results A total of 13 962 ILl cases were reported from 2010 to 2015, and the average ILI% was 2.29%. All age groups were involved, with the maximum incidence found in the 0 -4 age group （37.07%） and the minimum incidence in the age group of over 60-year-old （9.92%）. 5 413 specimens were collected by sentinel hospitals, and 744 （13.74%） were positive. The number of preschool children, students and scattered children were top three populations in terms of the positive percent. The prevalent isolates varied with alternation of dominant strains from 2010 to 2015. Three outbreaks occurred, all in schools. Conclusion The situation of influenza surveillance was favorably normal. Winter and spring are prevalent seasons.Children, students and the elderly are the key targets of prevention and control. Prevention and control work should be conducted depending on the prevalent strains in different years and vaccination work should be timely implemented in September and October each year.