title: Clinical features of human metapneumovirus genotypes in children with acute lower respiratory tract infection in Changsha, China.
abstract: To explore the epidemiological and clinical features of different human metapneumovirus (hMPV) genotypes in hospitalized children. Reverse transcription polymerase chain reaction (RT-PCR) or PCR was employed to screen for both hMPV and other common respiratory viruses in 2613 nasopharyngeal aspirate specimens collected from children with lower respiratory tract infections from September 2007 to February 2011 (a period of 3.5 years). The demographics and clinical presentations of patients infected with different genotypes of hMPV were compared. A total of 135 samples were positive for hMPV (positive detection rate: 5.2%). Co-infection with other viruses was observed in 45.9% (62/135) of cases, and human bocavirus was the most common additional respiratory virus. The most common symptoms included cough, fever, and wheezing. The M gene was sequenced for 135 isolates; of these, genotype A was identified in 72.6% (98/135) of patients, and genotype B was identified in 27.4% (37/135) of patients. The predominant genotype of hMPV changed over the 3.5-year study period from genotype A2b to A2b or B1 and then to predominantly B1. Most of clinical features were similar between patients infected with different hMPV genotypes. These results suggested that hMPV is an important viral pathogen in pediatric patients with acute lower respiratory tract infection in Changsha. The hMPV subtypes A2b and B1 were found to co-circulate. The different hMPV genotypes exhibit similar clinical characteristics.
authors.affiliation: Hunan provincial People's Hospital, Changsha, China.|National Institute for Viral Disease Control and Prevention, China CDC, Beijing, China.
authors.forename: Sai-Zhen
authors.initials: SZ
authors.lastname: Zeng
authors.affiliation: Hunan provincial People's Hospital, Changsha, China.
authors.forename: Ni-Guang
authors.initials: NG
authors.lastname: Xiao
authors.affiliation: Hunan provincial People's Hospital, Changsha, China.
authors.forename: Li-Li
authors.initials: LL
authors.lastname: Zhong
authors.affiliation: Hunan provincial People's Hospital, Changsha, China.
authors.forename: Tian
authors.initials: T
authors.lastname: Yu
authors.affiliation: Hunan provincial People's Hospital, Changsha, China.
authors.forename: Bing
authors.initials: B
authors.lastname: Zhang
authors.affiliation: National Institute for Viral Disease Control and Prevention, China CDC, Beijing, China.
authors.forename: Zhao-Jun
authors.initials: ZJ
authors.lastname: Duan
mesh_terms: D002681:China / Q000453:epidemiology; D060085:Coinfection / Q000453:epidemiology / Q000473:pathology / Q000821:virology; D005260:Female; D005838:Genotype; D006760:Hospitalization; D056661:Human bocavirus; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D029121:Metapneumovirus / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D017720:Molecular Epidemiology; D018184:Paramyxoviridae Infections / Q000453:epidemiology / Q000473:pathology* / Q000821:virology*; D015995:Prevalence; D012141:Respiratory Tract Infections / Q000453:epidemiology / Q000473:pathology* / Q000821:virology*; D017422:Sequence Analysis, DNA; D015678:Viral Structural Proteins / Q000235:genetics
chemical_list: D015678:Viral Structural Proteins
keywords: acute lower respiratory tract infections; children; clinical feature; genotype; human metapneumovirus