h3n8 - H3N8 bird flu is a different biblioteca virus to the H5N1 bird flu currently spreading between birds other animals and humans in the US and worldwide H3N8 viruses were first identified in wild birds in A Comprehensive Review on Equine Influenza Virus Etiology The H3N8 equine influenza virus EIV emerged in 1963 by transfer of an avian influenza virus and the H3N8 canine influenza virus CIV subsequently emerged in 1999 when EIV transferred to dogs H3N8 CIV persistently circulated in only a few locations in the USA and has not been detected since 2016 A 4yearold boy from Henan Province was confirmed to have been infected with an avian influenza A H3N8 virus after consuming chickens from his backyard The virus has not acquired the ability of sustained transmission among humans but further investigation is ongoing to assess the risk and prevent future cases Avian Influenza AH3N8 China World Health Organization WHO H3N8 is a subtype of the species Influenza A virus that is endemic in birds horses and dogs It is the main cause of equine influenza and is also known as equine influenza virusIn 2011 it was reported to have been found in seals 1 Cats have been experimentally infected with the virus leading to clinical signs shedding of the virus and infection of other cats 2 Background The H3N8 avian influenza virus AIV has been circulating in wild birds with occasional interspecies transmission to mammals The first human infection of H3N8 subtype occurred in Henan Province China in April 2022 We aimed to investigate clinical epidemiological and virological data related to a second case identified soon afterwards in Hunan Province China The novel H3N8 virus that caused human infection had originated from chickens a typical spillover The virus is a triple reassortment strain with the Eurasian avian H3 gene citibet 69 slot North American avian N8 gene and dynamic internal genes of the H9N2 viruses The virus already possesses binding ability to humantype receptors though the risk of the H3N8 virus infection in humans was low and the Avian Influenza AH3N8 China World Health Organization WHO Human infection of avian influenza A H3N8 virus and the viral origins Understanding the divergent evolution and epidemiology of H3N8 LPAI AH3N8 viruses have been identified in wild birds and poultry in Asia A small number of AH3N8 virus infections have been reported in China resulting in severe pneumonia in two cases with one death and mild illness in one case Avian Influenza AH5 Viruses What Is H3N8 Bird Flu Risk for Humans in US Newsweek A 56yearold woman from Guangdong province died of severe pneumonia after exposure to live poultry or wild birds This is the third reported case of human infection with avian influenza A H3N8 in China since 2022 Avian influenza AH3N8 viruses are some of the most commonly detected subtypes in wild birds and have been found in live poultry markets in Asia causing little to no sign of disease Spillover infections of AH3N8 avian influenza viruses have been reported in mammals including dogs seals and horses Transmission to humans is sporadic Avian Influenza Type A Bird Flu CDC Factsheet on AH3N8 European Centre for Disease Prevention and Control Human infection of avian influenza A H3N8 virus and the viral PubMed H3N8 subtypes are the main cause of EIV infection and vaccine virus different from prevailing subtypes leads to subclinical infection which is followed by viral shedding from vaccinated animals as well This further contributes to the spread of disease Daly et al 2004 Influenza A viruses are able to evade host immunity even in vaccinated Influenza A kepala besar virus subtype H3N8 Wikipedia
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