Highly pathogenic avian influenza,
United States of America
Information received on 06/03/2017 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 01/03/2017
Date of confirmation of the event 04/03/2017
Report date 06/03/2017
Date submitted to OIE 06/03/2017
Date event resolved 11/08/2017
Reason for notification Recurrence of a listed disease
Date of previous occurrence 2016
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H7
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)
Follow-up report No. 2 (17/03/2017)
Follow-up report No. 3 (24/03/2017)
Follow-up report No. 4 (11/08/2017)
New outbreaks (1)
Outbreak 1 Lincoln County, Lincoln, Tennessee
Date of start of the outbreak 01/03/2017
Outbreak status Resolved (11/08/2017)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 74000 700 73300 0
Affected population Commercial chicken broiler-breeder flock
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 74000 ** 700 73300 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds ** 0.95% ** 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 existing avian influenza response plans, the USDA Animal and Plant Health Inspection Service (APHIS), in conjunction with the Tennessee Department of Agriculture, are responding to the identification of a highly pathogenic avian influenza (HPAI) H7 of North American wild bird lineage detection in a chicken broiler breeder flock. Further virus characterization including N-type is pending. This is the first confirmed case of HPAI in commercial poultry in the United States this year. A comprehensive epidemiological investigation in the surrounding area has begun along with enhanced surveillance and testing. State officials have quarantined the affected premises and implemented movement controls. Depopulation of birds on the premises has been completed.
Control measures
Measures applied
  • Movement control inside the country
  • Quarantine
  • Surveillance outside containment and/or protection zone
  • Stamping out
  • Surveillance within containment and/or protection zone
  • Zoning
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • Disinfection
  • Official disposal of carcasses, by-products and waste
Diagnostic test results
Laboratory name and type Species Test Test date Result
National Veterinary Services Laboratories (NVSL) (National laboratory) Birds virus isolation Pending
National Veterinary Services Laboratories (NVSL) (National laboratory) Birds virus sequencing 04/03/2017 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations