tetano
Editor, Senior Moderator
Emerg Infect Dis
. 2022 Aug 29;28(10).
doi: 10.3201/eid2810.221067. Online ahead of print.
Novel Zoonotic Avian Influenza Virus A(H3N8) Virus in Chicken, Hong Kong, China
Thomas H C Sit, Wanying Sun, Anne C N Tse, Christopher J Brackman, Samuel M S Cheng, Amy W Yan Tang, Jonathon T L Cheung, Malik Peiris, Leo L M Poon
Abstract
Zoonotic and pandemic influenza continue to pose threats to global public health. Pandemics arise when novel influenza A viruses, derived in whole or in part from animal or avian influenza viruses, adapt to transmit efficiently in a human population that has little population immunity to contain its onward transmission. Viruses of previous pandemic concern, such as influenza A(H7N9), arose from influenza A(H9N2) viruses established in domestic poultry acquiring a hemagglutinin and neuraminidase from influenza A viruses of aquatic waterfowl. We report a novel influenza A(H3N8) virus in chicken that has emerged in a similar manner and that has been recently reported to cause zoonotic disease. Although they are H3 subtype, these avian viruses are antigenically distant from contemporary human influenza A(H3N2) viruses, and there is little cross-reactive immunity in the human population. It is essential to heighten surveillance for these avian A(H3N8) viruses in poultry and in humans.
Keywords: Avian influenza virus; China; H3N8; Hong Kong; chicken; emergence; human; immunity; influenza; influenza virus; novel; population; respiratory infections; serology; viruses; zoonoses.
. 2022 Aug 29;28(10).
doi: 10.3201/eid2810.221067. Online ahead of print.
Novel Zoonotic Avian Influenza Virus A(H3N8) Virus in Chicken, Hong Kong, China
Thomas H C Sit, Wanying Sun, Anne C N Tse, Christopher J Brackman, Samuel M S Cheng, Amy W Yan Tang, Jonathon T L Cheung, Malik Peiris, Leo L M Poon
- PMID: 36037827
- DOI: 10.3201/eid2810.221067
Abstract
Zoonotic and pandemic influenza continue to pose threats to global public health. Pandemics arise when novel influenza A viruses, derived in whole or in part from animal or avian influenza viruses, adapt to transmit efficiently in a human population that has little population immunity to contain its onward transmission. Viruses of previous pandemic concern, such as influenza A(H7N9), arose from influenza A(H9N2) viruses established in domestic poultry acquiring a hemagglutinin and neuraminidase from influenza A viruses of aquatic waterfowl. We report a novel influenza A(H3N8) virus in chicken that has emerged in a similar manner and that has been recently reported to cause zoonotic disease. Although they are H3 subtype, these avian viruses are antigenically distant from contemporary human influenza A(H3N2) viruses, and there is little cross-reactive immunity in the human population. It is essential to heighten surveillance for these avian A(H3N8) viruses in poultry and in humans.
Keywords: Avian influenza virus; China; H3N8; Hong Kong; chicken; emergence; human; immunity; influenza; influenza virus; novel; population; respiratory infections; serology; viruses; zoonoses.
