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目的了解深圳市龙岗区甲型H1N1流感聚集性疫情流行特点。方法通过深圳市龙岗区流感监测网络,收集整理甲型H1N1流感聚集性疫情资料;利用反转录-聚合酶链反应技术检测甲型H1N1流感病毒。结果 2009年共发生甲型H1N1流感聚集性疫情62起,流感样病例811例,总罹患率为6.60%。疫情主要发生在9-11月(占88.71%),学校累计报告57起,占91.94%。各起疫情平均报告时间为1～7d,中位数为3d。甲型H1N1流感疫情持续时间为2～23 d,中位数为7 d;季节性流感疫情持续时间为2～15d,中位数为4d;差异有统计学意义(P<0.05)。2009年流感疫情发生时共采样251份,其中阳性162份,阳性率为64.54%。结论深圳市龙岗区2009年甲型H1N1流感聚集性疫情流行强度高于前三年季节性流感平均水平,9-11月是该区甲型H1N1流感样病例暴发疫情的高发季节,以局部暴发为主要特征,学校是高发场所。加强疾病监测,落实防控措施,积极开展健康教育,及早报告有利于疫情及时控制。
Objective To understand the epidemic situation of influenza A (H1N1) influenza in Longgang District, Shenzhen. Methods Influenza A (H1N1) was collected through the influenza surveillance network in Longgang District, Shenzhen. Influenza A (H1N1) virus was detected by reverse transcription polymerase chain reaction (RT - PCR). Results A total of 62 influenza A (H1N1) outbreaks were reported in 2009, and 811 were influenza-like illness cases with a total attack rate of 6.60%. The outbreak mainly occurred from September to November (88.71%), with a total of 57 reports (91.94%). The average reporting time of each epidemic situation was 1 ~ 7d, the median was 3d. Influenza A (H1N1) outbreaks ranged from 2 to 23 days, with a median of 7 days. The duration of seasonal influenza outbreaks ranged from 2 to 15 days, with a median of 4 days. The difference was statistically significant (P <0.05). A total of 251 samples were collected during the 2009 influenza outbreak, of which 162 were positive, with a positive rate of 64.54%. Conclusion The prevalence of Influenza A (H1N1) epidemic in 2009 in Longgang District, Shenzhen was higher than the average of the previous three years. The highest incidence of Influenza A (H1N1) -like outbreaks occurred in September to November in this area. The main characteristics of the school is a high incidence of places. Strengthen disease surveillance, implementation of prevention and control measures, and actively carry out health education, early reporting is conducive to timely control of the epidemic.