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H9N2 infection

Posted on : 19 Feb 2020

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  • H9N2 avian influenza viruses have become globally widespread in poultry over the last two decades and represent a genuine threat both to the global poultry industry but also humans through their high rates of zoonotic infection and pandemic potential.
  • It is a subtype of the influenza A virus, which causes human influenza as well as bird flu.
  • Influenza A viruses are members of the Orthomyxoviridae family and contain a segmented, negative-sense RNA genome encoding 10 core proteins and a variable number of accessory proteins.
  • Influenza A viruses are commonly characterised by their combinations of surface proteins, haemagglutinin (HA) and neuraminidase (NA), giving rise to a multitude of different subtypes designated, for example, as H1N1, H5N6, or H9N2.
  • H9N2 virus infections in humans are rare, but likely under-reported due to typically mild symptoms of the infections.
  • Cases of human infection have been observed in Hong Kong, China, Bangladesh, Pakistan, and Egypt. One case was detected in Oman recently.
  • The first case globally was reported from Hong Kong in 1998.

Article Related Questions

  1. Indian scientists have detected the country’s first case of H9N2 infection with a rare variant of the virus that causes avian influenza, or bird flu. Regarding the H9N2 virus consider the following statements
    1.H9N2 is a subtype of the influenza A virus.
    2.They are found worldwide in wild birds and are endemic in poultry in many areas.
    3.The H9N2 subtype was isolate for the first time in Singapore.
    Select the correct answer using the codes given below:

  2. 1.1 only

    2.1 and 2 only

    3.2 and 3 only

    4.1, 2 and 3

    Right Ans : 1 and 2 only

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