tetano
Editor, Senior Moderator
Influenza Other Respi Viruses. 2011 Jan;5(1):53-9. doi: 10.1111/j.1750-2659.2010.00159.x. Epub 2010 Aug 24.
Emergency surveillance of influenza during 2009 in the Chinese city of Qingdao.
Wang ZG, Yi Y, Yang TT, Liu XL, Jiang FC, Wang ZY, Chen JM.
Qingdao Center for Disease Control and Prevention, Qingdao, China College of Public Health, Shandong University, Shandong, China China Animal Health and Epidemiology Center, Qingdao, China.
Abstract
Please cite this paper as: Wang et al. (2010) Emergency surveillance of influenza during 2009 in the Chinese city of Qingdao. Influenza and Other Respiratory Viruses 5(1), 53-59. Background In April, 2009, a new influenza pandemic caused by a swine-origin H1N1 subtype influenza virus was imminent. We thereby carried out an emergency surveillance study in a Chinese city of Qingdao. Methods Pharyngeal swab samples were collected from four targeted groups and tested by reverse-transcription polymerase chain reaction. Each laboratory-confirmed pandemic H1N1 case or cluster was investigated, and the hemagglutinin genes of some of the viruses were sequenced and analyzed. Results A total of 140 pandemic H1N1 cases including 92 from 7 clusters were identified in the four targeted groups. None of them developed into severe infections. Meanwhile, 103 cases of seasonal influenza (98 H3N2 and 5 H1N1) and 10 clusters of seasonal H3N2 influenza were also identified. Among them, 38 pandemic H1N1 and two seasonal H3N2 influenza cases were air travellers, suggesting that air travel facilitates the spread of pandemic and seasonal influenza even in the northern hemisphere summer. In addition, it was found that pandemic H1N1 and seasonal H3N2 influenza viruses co-circulated in two clusters. No significant mutations were found in the hemagglutinin gene sequences of pandemic H1N1 viruses, but the seasonal H3N2 influenza viruses have become genetically distinguishable from those circulating in 2007-2008.
? 2010 Blackwell Publishing Ltd.
PMID: 21138541 [PubMed - in process]
http://www.ncbi.nlm.nih.gov/pubmed/21138541
Emergency surveillance of influenza during 2009 in the Chinese city of Qingdao.
Wang ZG, Yi Y, Yang TT, Liu XL, Jiang FC, Wang ZY, Chen JM.
Qingdao Center for Disease Control and Prevention, Qingdao, China College of Public Health, Shandong University, Shandong, China China Animal Health and Epidemiology Center, Qingdao, China.
Abstract
Please cite this paper as: Wang et al. (2010) Emergency surveillance of influenza during 2009 in the Chinese city of Qingdao. Influenza and Other Respiratory Viruses 5(1), 53-59. Background In April, 2009, a new influenza pandemic caused by a swine-origin H1N1 subtype influenza virus was imminent. We thereby carried out an emergency surveillance study in a Chinese city of Qingdao. Methods Pharyngeal swab samples were collected from four targeted groups and tested by reverse-transcription polymerase chain reaction. Each laboratory-confirmed pandemic H1N1 case or cluster was investigated, and the hemagglutinin genes of some of the viruses were sequenced and analyzed. Results A total of 140 pandemic H1N1 cases including 92 from 7 clusters were identified in the four targeted groups. None of them developed into severe infections. Meanwhile, 103 cases of seasonal influenza (98 H3N2 and 5 H1N1) and 10 clusters of seasonal H3N2 influenza were also identified. Among them, 38 pandemic H1N1 and two seasonal H3N2 influenza cases were air travellers, suggesting that air travel facilitates the spread of pandemic and seasonal influenza even in the northern hemisphere summer. In addition, it was found that pandemic H1N1 and seasonal H3N2 influenza viruses co-circulated in two clusters. No significant mutations were found in the hemagglutinin gene sequences of pandemic H1N1 viruses, but the seasonal H3N2 influenza viruses have become genetically distinguishable from those circulating in 2007-2008.
? 2010 Blackwell Publishing Ltd.
PMID: 21138541 [PubMed - in process]
http://www.ncbi.nlm.nih.gov/pubmed/21138541