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目的了解上海市浦东新区流感监测工作中病例的选择对于流感病毒检出率的影响因素。方法根据浦东新区2家国家级流感监测哨点2014—2015年采集的流感样病例咽拭子样本的相关资料,进行logistic回归分析。结果 2014—2015年浦东新区流感样病例流感病毒检出率为20.19%。经logistic回归分析,年龄、发病季节、送检时间及检测时间是流感病毒检出率的影响因素(P<0.05),医院、性别、城镇及发病天数对流感病毒检出率的影响因素无统计学意义。浦东新区流感样病例≥65岁年龄组流感病毒检出率最高(28.57%),冬季(12—2月)和夏季(6—9月)是浦东新区流感病毒的流行季节,2 d内进行检测的样本流感病毒检出率显著高于3 d以上再检测的样本。结论样本收集后2 d内须进行检测;1季度和3季度是流感病毒的流行季节,可以尽量多采集样本。
Objective To understand the influencing factors on the detection rate of influenza virus among the cases of influenza surveillance in Shanghai Pudong New Area. Methods Based on the data of throat swab samples from two national influenza surveillance sentinel sites in Pudong New District during 2014-2015, logistic regression analysis was performed. Results The positive rate of influenza virus in the influenza-like cases in Pudong New Area during 2014-2015 was 20.19%. Logistic regression analysis showed that the influencing factors of the detection rate of influenza virus were age, onset season, delivery time and detection time (P <0.05). There was no statistical difference in the factors affecting the detection rate of influenza virus between hospital, sex, town and onset days Significance of learning. Influenza-like cases in Pudong New District had the highest detection rate (28.57%) of influenza viruses in the age group of ≥65 years. The epidemic season of influenza virus in Pudong New Area was in winter (December-February) and summer (June-September) Of the samples had a significantly higher detection rate of influenza virus than the samples re-detected above 3 days. Conclusion The samples should be tested within 2 days after the samples were collected. The first quarter and the third quarter are the influenza season, so as to collect as many samples as possible.