title: Brief report: Molecular characterization of a novel reassorted pandemic H1N1 2009 in Thai pigs.
abstract: For the past 10 years, endemic swine influenza H1 viruses in Thailand have been characterized as reassortants of swine virus genes from swine influenza viruses (SIV) in US and European pigs. Here the authors report the emergence of a novel reassorted H1N1 (rH1N1) virus consisted of human, avian, and swine virus genes from the pandemic H1N1 2009 (pH1N1) virus with a neuraminidase (NA) gene from a Thai swine H1N1 (ThH1N1) isolate. The rH1N1 virus was detected in nursery pigs during a respiratory disease outbreak in central Thailand in early 2010. The rH1N1 virus was repeatedly isolated from infected pigs, suggesting that it can transmit efficiently among the pig population. The appearance of rH1N1 virus in the field occurred within months of the introduction of pH1N1 virus into the Thai swine population in late 2009. The finding highlights the role of pig in generating newly reassorted influenza A viruses and also the significance of continuing disease surveillance and genetic characterization of SIV in pigs.
authors: Emerging and Re-emerging Infectious Diseases in Animals, Research Unit, Faculty of Veterinary Science, Chulalongkorn University, Henri Dunant Rd., Bangkok, 10330, Thailand. kaewtoon@gmail.com
authors: Pravina
authors: P
authors: Kitikoon
authors: Donruethai
authors: D
authors: Sreta
authors: Suparlark Nuntawan
authors: SN
authors: Na Ayudhya
authors: Manoosak
authors: M
authors: Wongphatcharachai
authors: Jiradej
authors: J
authors: Lapkuntod
authors: Duangduean
authors: D
authors: Prakairungnamthip
authors: Napawan
authors: N
authors: Bunpapong
authors: Sanipa
authors: S
authors: Suradhat
authors: Roongroje
authors: R
authors: Thanawongnuwech
authors: Alongkorn
authors: A
authors: Amonsin
mesh_terms: D000818:Animals; D016000:Cluster Analysis; D019143:Evolution, Molecular; D053118:Influenza A Virus, H1N1 Subtype / Q000235:genetics* / Q000302:isolation & purification*; D008969:Molecular Sequence Data; D009439:Neuraminidase / Q000235:genetics; D009976:Orthomyxoviridae Infections / Q000662:veterinary* / Q000821:virology; D010802:Phylogeny; D012367:RNA, Viral / Q000235:genetics; D016865:Reassortant Viruses / Q000235:genetics* / Q000302:isolation & purification*; D017422:Sequence Analysis, DNA; D013552:Swine; D013553:Swine Diseases / Q000821:virology*; D013785:Thailand; D014764:Viral Proteins / Q000235:genetics
chemical_list: D012367:RNA, Viral; D014764:Viral Proteins; C487630:NA protein, influenza A virus; D009439:Neuraminidase