Chen Jing-Fang, Sun Bian-Cheng, Yuan Jie, Zhang Ru-Sheng, Ou Xin-Hua
Southeast Asian J Trop Med Public Health. 2014 Mar;45(2):319-25.
The objective of this study was to examine the circulating influenza viruses in Changsha, China, during 2010-2012. Nasopharyngeal specimens were collected from persons with influenza-like illness (ILI) who presented for care at two hospitals. Of 2,955 patients tested, 278/(9.4%) were positive for influenza virus: 116/(41.7%) were influenza type A(H3N2), 79/(28.4%) were type A(H1N1) pandemic 2009 (pdm09) and 83/(29.9%) were influenza type B. The rates of virus detection varied by age and sex. The highest rate was in the 5-14 year old age group and females were infected more than males. After the initial 2009 A(H1N1) pdm09 outbreak, the number of cases of this virus declined and the season become shorter. Influenza A(H3N2) and B viruses occurred mainly during the spring and summer, while influenza A(H1N1)pdm09 occurred mainly during the winter and spring. Influenza A(H1N1)pdm09 replaced the usual seasonal H1N1 virus during 2010-2012. Continuing epidemiological surveillance of influenza virus is important to monitor trends in influenza infections and to develop prevention and control measures.
本研究的目的是检测2010 - 2012年期间中国长沙的流感病毒流行情况。从两家医院就诊的流感样疾病（ILI）患者中采集鼻咽拭子样本。在2955名接受检测的患者中，278例（9.4%）流感病毒检测呈阳性：116例（41.7%）为甲型（H3N2）流感，79例（28.4%）为2009年甲型（H1N1）大流行性流感（pdm09），83例（29.9%）为乙型流感。病毒检测率因年龄和性别而异。最高检测率出现在5 - 14岁年龄组，女性感染率高于男性。在2009年甲型（H1N1）pdm09首次爆发后，该病毒病例数下降，流行季节缩短。甲型（H3N2）和乙型流感病毒主要在春季和夏季出现，而甲型（H1N1）pdm09主要在冬季和春季出现。在2010 - 2012年期间，甲型（H1N1）pdm09取代了常见的季节性H1N1病毒。持续开展流感病毒的流行病学监测对于监测流感感染趋势以及制定预防和控制措施至关重要。
