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#Analysis of recent #scientific #information on #avian #influenza A(#H7N9) virus - 10 February 2017 (@WHO, edited)

  Title : #Analysis of recent #scientific #information on #avian #influenza A(#H7N9) virus - 10 February 2017. Subject : Avian Influenza, ...

9 Mar 2017

Highly pathogenic #avian #influenza #H7N9, #USA [N #American #lineage confirmed] (#OIE, Mar. 9 ‘17)


Title: Highly pathogenic #avian #influenza #H7N9, #USA [N #American #lineage confirmed].

Subject: Avian Influenza, H7N9 subtype, poultry epizootics in the US.

Source: OIE, full page: (LINK).

Code: [     ]

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Highly pathogenic avian influenza H7N9, United States of America

Information received on 08/03/2017 from Dr John Clifford, Official Delegate, Chief Trade Advisor, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America

  • Summary
    • Report type    Follow-up report No. 1
    • Date of start of the event    01/03/2017
    • Date of confirmation of the event    04/03/2017
    • Report date    08/03/2017
    • Date submitted to OIE    08/03/2017
    • Reason for notification    Reoccurrence of a listed disease
    • Date of previous occurrence    2016
    • Manifestation of disease    Clinical disease
    • Causal agent    Highly pathogenic avian influenza virus
    • Serotype    H7N9
    • Nature of diagnosis    Laboratory (advanced)
    • This event pertains to    a defined zone within the country
    • Related reports    Immediate notification (06/03/2017)
    • Follow-up report No. 1 (08/03/2017)
  • Outbreaks   
    • There are no new outbreaks in this report
  • Epidemiology
    • Source of the outbreak(s) or origin of infection   
      • Unknown or inconclusive
  • Epidemiological comments   
    • The USDA Animal and Plant Health Inspection Service (APHIS), in conjunction with the Tennessee Department of Agriculture, are continuing to respond to the identification of a highly pathogenic avian influenza (HPAI) H7N9 of North American wild bird lineage based on full genome sequence analysis in a chicken broiler breeder flock.
    • All eight gene segments of the virus are North American wild bird lineage.
    • This is NOT the same as the China H7N9 lineage that has impacted poultry and infected humans in Asia.
    • Although the subtypes are the same (H7N9) the virus detected in the United States is a very different virus, genetically distinct from the China H7N9 lineage.
    • A comprehensive epidemiological investigation in the surrounding area is continuing and enhanced surveillance and testing has begun.
    • The first round of testing of all commercial poultry premises in a 10 mile (16 kilometer) surveillance zone has been completed with all results negative for avian influenza virus.
    • State officials have quarantined the affected premises and implemented movement controls.
    • Depopulation of birds on the premises has been completed and disposal of the birds is near completion.

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Keywords: OIE; Updates; Avian Influenza; H7N9 ; Poultry; USA; Tennessee.

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