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11 Jan 2017

Highly pathogenic #influenza A viruses #H5N2, #USA [infected #wildbirds] (#OIE, Jan. 11 ‘17)


Title: Highly pathogenic #influenza A viruses #H5N2, #USA [infected #wildbirds].

Subject: Avian Influenza, H5N2 subtype, wild birds epizootic in Montana, USA.

Source: OIE, full page: (LINK).

Code: [     ]


Highly pathogenic influenza A viruses (infection with) (non-poultry and wild birds) H5N2, United States of America

Information received on 09/01/2017 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 27/12/2016
    • Date of confirmation of the event 09/01/2017
    • Report date 09/01/2017
    • Date submitted to OIE 10/01/2017
    • Reason for notification Reoccurrence of a listed disease
    • Date of previous occurrence 10/11/2016
    • Manifestation of disease Sub-clinical infection
    • Causal agent Highly pathogenic influenza A virus
    • Serotype H5N2
    • Nature of diagnosis Laboratory (advanced)
    • This event pertains to a defined zone within the country
  • New outbreaks
    • Summary of outbreaks
      • Total outbreaks: 1
        • Outbreak Location  - MONTANA ( Fergus County, Fergus )
          • Total animals affected: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
            • Mallard:Anatidae (Anas platyrhynchos)  - **  - … – … – … – …
          • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality  rate - Apparent case fatality rate - Proportion susceptible animals lost*
            • Mallard:Anatidae (Anas platyrhynchos) – ** – ** – ** – **
              • * 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
      • Contact with wild species
  • Epidemiological comments
    • The sample, from a wild mallard duck, was collected on 27 December 2016 as part of the hunter – harvested wild bird avian influenza surveillance program.
    • Genome sequencing results show that the Montana isolate is an Eurasian/American (EA/AM) H5N2 HPAI strain.
    • The partial genome fragments that have been analyzed thus far are >99% similar to the virus isolated from a northern pintail duck in Washington State in December 2014.
    • The H5N2 outbreak viruses from 2015 were all >99% similar to the northern pintail index case (A/Northern pintail/Washington/40964/2014 H5N2). Efforts
    • to obtain sequence data for the full genome are underway.
    • This detection of HPAI (EA/AM) H5N2 virus in a wild bird is NOT associated with any commercial poultry in the United States.



Keywords: OIE; Updates; H5N2; Avian Influenza; Wild Birds; Montana; USA.