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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, ...

10 Mar 2017

Low pathogenic #avian #influenza #H7N9, #USA [a #poultry #outbreak, Tennessee] (#OIE, Mar. 10 ‘17)


Title: Low pathogenic #avian #influenza #H7N9, #USA [a #poultry #outbreak, Tennessee].

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

Source: OIE, full page: (LINK).

Code: [     ]

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Low pathogenic avian influenza (poultry) H7N9, United States of America

Information received on 10/03/2017 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    Immediate notification
    • Date of start of the event    06/03/2017
    • Date of confirmation of the event    08/03/2017
    • Report date    10/03/2017
    • Date submitted to OIE    10/03/2017
    • Reason for notification    Reoccurrence of a listed disease
    • Date of previous occurrence    2017
    • Manifestation of disease    Sub-clinical infection
    • Causal agent    Low pathogenic avian influenza virus
    • Serotype    H7N9
    • Nature of diagnosis    Laboratory (advanced)
    • This event pertains to    a defined zone within the country
  • New outbreaks (1)
    • Outbreak 1    - Giles County, Giles, TENNESSEE
      • Date of start of the outbreak    06/03/2017
      • Outbreak status    Continuing (or date resolved not provided)
      • Epidemiological unit    Farm
      • Affected animals: Species    - Susceptible    - Cases    - Deaths    - Destroyed    - Slaughtered
        • Birds    - 16500  - … – 0    - 16500    - 0
        • Affected population: Commercial grandparent stock primary broiler breeder flock.
  • Summary of outbreaks   
    • Total outbreaks: 1
      • Total animals affected: Species    - Susceptible    - Cases    - Deaths    - Destroyed    - Slaughtered
        • Birds    - 16500    - **    - 0    - 16500    - 0
      • Outbreak statistics: Species    - Apparent morbidity rate    - Apparent mortality rate    - Apparent case fatality rate    - Proportion susceptible animals lost*
        • Birds    - **    - 0.00%    - **    - 100.00%
          • *Removed from the susceptible population through death, destruction and/or slaughter
          • **Not calculated because of missing information
  • Epidemiology
    • Source of the outbreak(s) or origin of infection   
      • Unknown or inconclusive
  • Epidemiological comments   
    • As part of routine, pre-slaughter testing and surveillance for H5/H7 Avian Influenza, low pathogenic avian influenza (LPAI) H7N9 of North American wild bird lineage was detected in healthy broiler breeder chickens.
    • This is the first detection of H7N9 LPAI poultry in TN and also the first detection of LPAI H7N9 in commercial poultry in the United States in 2017.
    • Although this is a low pathogenicity H7 strain, as a precautionary preventive measure, the flock was depopulated.
    • The USDA Animal Plant Health Inspection Service (APHIS) and the Tennessee Department of Agriculture are conducting a comprehensive epidemiological investigation and have implemented enhanced surveillance and testing related to this event.

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

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