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Article: Isolation of human metapneumovirus from children with acute respiratory tract infection in Chongqing, China

TitleIsolation of human metapneumovirus from children with acute respiratory tract infection in Chongqing, China
Authors
Issue Date2007
Publisher中華醫學會. The Journal's web site is located at http://zhek.periodicals.net.cn/
Citation
Zhonghua Er Ke Za Zhi. Chinese Journal Of Pediatrics, 2007, v. 45 n. 1, p. 42-45 How to Cite?
AbstractOBJECTIVE: To isolate and characterize the newly discovered human metapneumovirus (hMPV) in Chongqing, China and elucidate the clinical manifestations of hMPV infection. METHODS: Eighty-six patients hospitalized for acute respiratory tract infection in Children's Hospital, Chongqing University of Medical Sciences from December 2004 to July 2005 were enrolled in the present study. Nasopharyngeal aspirates were collected for screening for common respiratory viruses by direct immunofluorescence assay, including respiratory syncytial virus, influenza virus types A and B, parainfluenza virus types 1, 2, 3 and adenovirus, and for inoculating onto Vero-E6 and LLC-MK2 cells for hMPV isolation. Cultures were maintained in the presence of trypsin and observed for development of cytopathic effect (CPE) for 3 weeks. Presence of hMPV was first indicated by positive CPE and subsequently confirmed by reverse transcription polymerase chain reaction targeting N and F genes. Sequence of amplified F fragments were analyzed and submitted to NCBI GenBank. The clinical findings of hMPV infection were collected and analyzed. RESULTS: Of the collected 86 NPAs, six showed CPE characterized by clustering of infected cells, increased granules and eventuall detachment from cell monolayer and obvious syncytium formation. Successful isolation of hMPVs was confirmed with RT-PCR targeting hMPV F and N genes. Of the six hMPV-positive specimens, two were collected in winter (December, January), two in spring (May) and the other two in autumn (June, July). All the six patients were younger than 2 years of age with disease spectrum of bronchiolitis (2/6), bronchopneumonia (2/6), infantile asthma (1/6) and upper respiratory tract infection (1/6). Clinical findings included fever, cough, wheezing, polypnea, cyanosis and rales. Parainfluenza 3 and adenovirus seemed to beviral pathogens of co-infection. CONCLUSION: Six hMPVs were successfully isolated in the mainland of China for the first time. HMPV appears to be one important viral pathogen for acute lower respiratory tract infections in young children with a detection rate of 7% (6/86) by viral isolation. The virus causes respiratory diseases similar to those caused by respiratory syncytial virus. These findings highlight the need for future investigations to define disease burden of hMPV infection and molecular epidemiology among children in China.
Persistent Identifierhttp://hdl.handle.net/10722/146344
ISSN
2015 SCImago Journal Rankings: 0.146

 

DC FieldValueLanguage
dc.contributor.authorMao, HWen_HK
dc.contributor.authorYang, XQen_HK
dc.contributor.authorWang, LJen_HK
dc.contributor.authorHuang, Yen_HK
dc.contributor.authorZhao, XDen_HK
dc.date.accessioned2012-04-20T02:05:11Z-
dc.date.available2012-04-20T02:05:11Z-
dc.date.issued2007en_HK
dc.identifier.citationZhonghua Er Ke Za Zhi. Chinese Journal Of Pediatrics, 2007, v. 45 n. 1, p. 42-45en_HK
dc.identifier.issn0578-1310en_HK
dc.identifier.urihttp://hdl.handle.net/10722/146344-
dc.description.abstractOBJECTIVE: To isolate and characterize the newly discovered human metapneumovirus (hMPV) in Chongqing, China and elucidate the clinical manifestations of hMPV infection. METHODS: Eighty-six patients hospitalized for acute respiratory tract infection in Children's Hospital, Chongqing University of Medical Sciences from December 2004 to July 2005 were enrolled in the present study. Nasopharyngeal aspirates were collected for screening for common respiratory viruses by direct immunofluorescence assay, including respiratory syncytial virus, influenza virus types A and B, parainfluenza virus types 1, 2, 3 and adenovirus, and for inoculating onto Vero-E6 and LLC-MK2 cells for hMPV isolation. Cultures were maintained in the presence of trypsin and observed for development of cytopathic effect (CPE) for 3 weeks. Presence of hMPV was first indicated by positive CPE and subsequently confirmed by reverse transcription polymerase chain reaction targeting N and F genes. Sequence of amplified F fragments were analyzed and submitted to NCBI GenBank. The clinical findings of hMPV infection were collected and analyzed. RESULTS: Of the collected 86 NPAs, six showed CPE characterized by clustering of infected cells, increased granules and eventuall detachment from cell monolayer and obvious syncytium formation. Successful isolation of hMPVs was confirmed with RT-PCR targeting hMPV F and N genes. Of the six hMPV-positive specimens, two were collected in winter (December, January), two in spring (May) and the other two in autumn (June, July). All the six patients were younger than 2 years of age with disease spectrum of bronchiolitis (2/6), bronchopneumonia (2/6), infantile asthma (1/6) and upper respiratory tract infection (1/6). Clinical findings included fever, cough, wheezing, polypnea, cyanosis and rales. Parainfluenza 3 and adenovirus seemed to beviral pathogens of co-infection. CONCLUSION: Six hMPVs were successfully isolated in the mainland of China for the first time. HMPV appears to be one important viral pathogen for acute lower respiratory tract infections in young children with a detection rate of 7% (6/86) by viral isolation. The virus causes respiratory diseases similar to those caused by respiratory syncytial virus. These findings highlight the need for future investigations to define disease burden of hMPV infection and molecular epidemiology among children in China.en_HK
dc.languageengen_US
dc.publisher中華醫學會. The Journal's web site is located at http://zhek.periodicals.net.cn/en_HK
dc.relation.ispartofZhonghua er ke za zhi. Chinese journal of pediatricsen_HK
dc.titleIsolation of human metapneumovirus from children with acute respiratory tract infection in Chongqing, Chinaen_HK
dc.typeArticleen_HK
dc.identifier.emailMao, HW:hwmau@hku.hken_HK
dc.identifier.authorityMao, HW=rp01595en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.pmid17349150-
dc.identifier.scopuseid_2-s2.0-72449174393en_HK
dc.identifier.volume45en_HK
dc.identifier.issue1en_HK
dc.identifier.spage42en_HK
dc.identifier.epage45en_HK
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridMao, HW=25632489000en_HK
dc.identifier.scopusauthoridYang, XQ=13606095400en_HK
dc.identifier.scopusauthoridWang, LJ=7409179038en_HK
dc.identifier.scopusauthoridHuang, Y=34770915100en_HK
dc.identifier.scopusauthoridZhao, XD=7407577513en_HK

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