title: Possible pandemic threat from new reassortment of influenza A(H7N9) virus in China.
abstract: Avian influenza A(H7N9) virus re-emerged in China in December 2013, after a decrease in the number of new cases during the preceding six months. Reassortment between influenza A(H7N9) and local H9N2 strains has spread from China's south-east coast to other regions. Three new reassortments of A(H7N9) virus were identified by phylogenetic analysis: between A(H7N9) and Zhejiang-derived strains, Guangdong/Hong Kong-derived strains or Hunan-derived A(H9N2) strains. Our findings suggest there is a possible risk that a pandemic could develop.
authors.affiliation: Shanghai Public Health Clinical Center and Institutes of Biomedical Sciences, Key Laboratory of Medical Molecular Virology of Ministry of Education/Health, Shanghai Medical College, Fudan University, Shanghai, China.
authors.forename: Z
authors.initials: Z
authors.lastname: Meng
authors.forename: R
authors.initials: R
authors.lastname: Han
authors.forename: Y
authors.initials: Y
authors.lastname: Hu
authors.forename: Z
authors.initials: Z
authors.lastname: Yuan
authors.forename: S
authors.initials: S
authors.lastname: Jiang
authors.forename: X
authors.initials: X
authors.lastname: Zhang
authors.forename: J
authors.initials: J
authors.lastname: Xu
mesh_terms: D000818:Animals; D001717:Birds; D002681:China / Q000453:epidemiology; D021821:Communicable Diseases, Emerging / Q000635:transmission / Q000821:virology*; D006723:Hong Kong; D006801:Humans; D064766:Influenza A Virus, H7N9 Subtype / Q000235:genetics / Q000302:isolation & purification*; D053127:Influenza A Virus, H9N2 Subtype / Q000235:genetics / Q000302:isolation & purification*; D005585:Influenza in Birds / Q000453:epidemiology / Q000235:genetics / Q000821:virology; D007251:Influenza, Human / Q000453:epidemiology* / Q000235:genetics / Q000821:virology; D058873:Pandemics; D010802:Phylogeny; D012367:RNA, Viral / Q000235:genetics*; D017421:Sequence Analysis
chemical_list: D012367:RNA, Viral