Low pathogenic avian influenza (poultry) H7N7, United States of America (OIE, July 16 2013): No New Outbreaks

[Giuseppe]

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


Low pathogenic avian influenza (poultry) H7N7, United States of America


Information received on 15/07/2013 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. 1
  • Date of start of the event 06/06/2013
  • Date of pre-confirmation of the event 17/06/2013
  • Report date 15/07/2013
  • Date submitted to OIE 15/07/2013
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 01/08/2011
  • Manifestation of disease Clinical disease
  • Causal agent Low pathogenic avian influenza virus
  • Serotype H7N7
  • Nature of diagnosis Laboratory (advanced)
  • This event pertains to a defined zone within the country
  • Related reports
    • Immediate notification (19/06/2013)
    • Follow-up report No. 1 (15/07/2013)
• 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 Plant Health Inspection Service (APHIS) and the Arkansas Livestock & Poultry Commission are conducting a comprehensive epidemiological investigation of this event.
  • Update as of July 10, 2013:
    • Enhanced surveillance is being conducted on all flocks within a 10 km (6.2 mile) zone and on all flocks epidemiologically linked to the affected premises. The following premises have been identified in the surveillance zone:
      • Twenty-nine (29) commercial poultry facilities have been identified within the zone. Of the 29, only seventeen (17)currently have poultry on the premises o Fifty-one (51) back yard flocks have been identified in the surveillance zone with none of them having any epidemiological link to the index premises. Three premises were identified to be outside the surveillance zone and not re-tested on the 2nd round of testing.
      • Three (3) high risk epidemiologically linked premises identified. One of the facilities harvested birds earlier and birds were confirmed negative for AI on routine testing for AI prior to moving to slaughter. There are currently no birds on the facility.
    • The first and second round of testing of all poultry in the surveillance zone and epidemiologically linked premises has been completed. All laboratory testing yielded negative results for avian influenza.
    • The affected flock has been depopulated and cleaning and disinfection (C&D) of the premises has been initiated.
    • 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 (2012).
• Control measures
  • Measures applied
    • Stamping out
    • Quarantine
    • Movement control inside the country
    • Zoning
    • Disinfection of infected premises/establishment(s)
    • 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
    • Arkansas Livestock & Poultry Commission (ALPC) Laboratory (Local laboratory) ? Birds - enzyme-linked immunosorbent assay (ELISA) - 26/06/2013 ? Negative
    • Arkansas Livestock & Poultry Commission (ALPC) Laboratory (Local laboratory) ? Birds - real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) - 26/06/2013 ? Negative
    • Arkansas Livestock & Poultry Commission (ALPC) Laboratory (Local laboratory) ? Birds - real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) - 28/06/2013 ? Negative
    • Arkansas Livestock & Poultry Commission (ALPC) Laboratory (Local laboratory) ? Birds - real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) - 09/07/2013 ? Negative
    • National Veterinary Services Laboratories (NVSL) (National laboratory) ? Birds - virus isolation - Pending
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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