Highly pathogenic avian influenza,
United States of America
Information received on 15/01/2016 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
Report type Immediate notification
Date of start of the event 11/01/2016
Date of confirmation of the event 15/01/2016
Report date 15/01/2016
Date submitted to OIE 15/01/2016
Date event resolved 24/03/2016
Reason for notification Reoccurrence of a listed disease
Date of previous occurrence 2015
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H7N8
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (15/01/2016)
Follow-up report No. 1 (25/01/2016)
Follow-up report No. 2 (01/02/2016)
Follow-up report No. 3 (09/02/2016)
Follow-up report No. 4 (29/02/2016)
Follow-up report No. 5 (22/04/2016)
New outbreaks (1)
Outbreak 1 Dubois County, Dubois, INDIANA
Date of start of the outbreak 11/01/2016
Outbreak status Resolved (24/03/2016)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 43500 900 42600 0
Affected population Commercial turkey flock
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 43500 ** 900 42600 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds ** 2.07% ** 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
**Not calculated because of missing information
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 Indiana State Board of Animal Health, are conducting a comprehensive epidemiological investigation in the nearby area, and have begun enhanced surveillance and testing in the area. State officials have quarantined the affected premises and implemented movement controls. Depopulation of birds on the premises is under way. The highly pathogenic H7N8 strain is of North America lineage.
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 / Disinfestation
  • 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 real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 15/01/2016 Positive
National Veterinary Services Laboratories (NVSL) (National laboratory) Birds virus isolation Pending
National Veterinary Services Laboratories (NVSL) (National laboratory) Birds virus sequencing 15/01/2016 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations