Low pathogenic avian influenza (poultry),
United States of America
Information received on 22/10/2018 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 19/10/2018
Date of confirmation of the event 20/10/2018
Report date 22/10/2018
Date submitted to OIE 22/10/2018
Date event resolved 30/01/2019
Reason for notification Recurrence of a listed disease
Date of previous occurrence 2018
Manifestation of disease Sub-clinical infection
Causal agent Low pathogenic avian influenza virus
Serotype H5N2
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (22/10/2018)
Follow-up report No. 1 (02/11/2018)
Follow-up report No. 2 (08/11/2018)
Follow-up report No. 3 (15/11/2018)
Follow-up report No. 4 (28/11/2018)
Follow-up report No. 5 (15/02/2019)
New outbreaks (1)
Outbreak 1 ( K1) Kandiyohi County, Kandiyohi, Minnesota
Date of start of the outbreak 19/10/2018
Outbreak status Resolved (20/12/2018)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 40000 0 0 40000
Affected population Commercial meat-type turkey flock
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 40000 ** 0 0 40000
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds ** 0.00% ** 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 Following the 2015 highly pathogenic avian influenza (HPAI) outbreak that occurred in central Minnesota, increased surveillance has been implemented during the spring and fall months. This routine surveillance detected a low pathogenic avian influenza (LPAI) H5N2 in a commercial meat-type turkey flock. The flock was healthy and not showing any clinical signs of AI. Partial HA/NA sequencing determined the H5 and N2 to be a low pathogenic virus of North American wild bird lineage. Further characterization is pending virus recovery. The Minnesota Board of Animal Health (BAH) and USDA, Animal and Plant Health Inspection Services (APHIS) are conducting an epidemiological investigation of the event and have increased surveillance in the area as a result of this detection. State officials have quarantined the affected premises and implemented movement controls. Turkeys from this premises will be depopulated through controlled marketing.
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance outside containment and/or protection zone
  • Surveillance within containment and/or protection zone
  • Quarantine
  • Zoning
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Disinfection
Diagnostic test results
Laboratory name and type Species Test Test date Result
Minnesota Poultry Testing Laboratory (Local laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 19/10/2018 Positive
National Veterinary Services Laboratory (National laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 20/10/2018 Positive
National Veterinary Services Laboratory (National laboratory) Birds virus isolation Pending
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations