title: Infection with possible precursor of avian influenza A(H7N9) virus in a child, China, 2013.
abstract: During the early stage of the avian influenza A(H7N9) epidemic in China in March 2013, a strain of the virus was identified in a 4-year-old boy with mild influenza symptoms. Phylogenetic analysis indicated that this strain, which has similarity to avian subtype H9N2 viruses, may represent a precursor of more-evolved H7N9 subtypes co-circulating among humans.
authors: Lili
authors: L
authors: Ren
authors: Xuelian
authors: X
authors: Yu
authors: Baihui
authors: B
authors: Zhao
authors: Fan
authors: F
authors: Wu
authors: Qi
authors: Q
authors: Jin
authors: Xi
authors: X
authors: Zhang
authors: Jianwei
authors: J
authors: Wang
mesh_terms: D000595:Amino Acid Sequence; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D016679:Genome, Viral; D005838:Genotype; D006801:Humans; D064766:Influenza A Virus, H7N9 Subtype / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D007251:Influenza, Human / Q000453:epidemiology* / Q000821:virology*; D008297:Male; D008969:Molecular Sequence Data; D009439:Neuraminidase / Q000235:genetics; D010802:Phylogeny; D016415:Sequence Alignment; D014764:Viral Proteins / Q000235:genetics
chemical_list: D014764:Viral Proteins; C487630:NA protein, influenza A virus; D009439:Neuraminidase
keywords: A(H7N9); China; adaption; avian influenza virus; evolution; fomite; genome sequence; pediatric; phylogenetics; respiratory infections; viruses; zoonoses