Low pathogenic avian influenza (poultry) H5N8, United States of America (OIE, May 7 2014): No New Outbreaks, Reassortant isolated

[Giuseppe]

[Source: OIE, full page: (LINK). Edited.]


Low pathogenic avian influenza (poultry) H5N8, United States of America


Information received on 06/05/2014 from Dr John Clifford, Deputy Administrator, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America

• Summary
  • Report type Follow-up report No. 2
  • Date of start of the event 14/04/2014
  • Date of pre-confirmation of the event 18/04/2014
  • Report date 06/05/2014
  • Date submitted to OIE 06/05/2014
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 06/08/2013
  • Manifestation of disease Clinical disease
  • Causal agent Low pathogenic avian influenza virus
  • Serotype H5N8
  • Nature of diagnosis Laboratory (advanced)
  • This event pertains to a defined zone within the country
  • Related reports
    • Immediate notification (22/04/2014)
    • Follow-up report No. 1 (29/04/2014)
    • Follow-up report No. 2 (06/05/2014)
• Outbreaks
  • There are no new outbreaks in this report
• Epidemiology
  • Source of the outbreak(s) or origin of infection
    • Unknown or inconclusive
• Epidemiological comments
  • Update of the event as of 1st May 2014:
    • An H5N8 virus was isolated.
      • H5 is 98.2% similar to A/mallard/California/1435/2013 (H5N5) based on sequence from the complete hemagglutinin gene.
      • N8 is 95.7% similar to A/Mallard/Interior Alaska/6MP0160AR1/2006 (H3N8) based on sequence from the complete neuraminidase gene.
      • Chicken pathogenicity testing is compatible with low pathogenic avian influenza virus.
    • Flock Plans? were completed for the index premises and other at risk premises and include testing schemes, biosecurity protocols, and product movement guidelines.
    • Follow-up surveillance and testing for influenza A virus (IAV) continues on the two (2) epidemiologically associated farms?results are pending.
      • In addition, a surveillance and outreach plan is being implemented within a 10 km Control Area.
      • The joint United States Department of Agriculture (USDA) and California Department of Food and Agriculture (CDFA) epidemiological investigation and response to the event are continuing.
  • Note by the OIE Animal Health Information Department:
    • H5 and H7 avian influenza in its low pathogenic form in poultry is a notifiable disease as per Chapter 10.4. on avian influenza of the Terrestrial Animal Health Code (2013).
• Control measures
  • Measures applied
    • Stamping out
    • Quarantine
    • Vaccination prohibited
    • No treatment of affected animals
  • Measures to be applied
    • No other measures
• Diagnostic test results
  • Laboratory name and type ? Species ? Test - Test date ? Result
    • National Veterinary Services Laboratories (NVSL) (National laboratory) ? Birds - virus isolation - 01/05/2014 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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