Low pathogenic avian influenza (poultry),
United States of America
Information received on 08/11/2018 from Dr Jack Shere, Deputy Administrator Chief Veterinary Office r, USDA-APHISVeterinary Services, USA United States Department of Agriculture, WASHINGTON, United States of America
Summary
Report type Follow-up report No. 2
Date of start of the event 19/10/2018
Date of confirmation of the event 20/10/2018
Report date 08/11/2018
Date submitted to OIE 08/11/2018
Reason for notification Recurrence of a listed disease
Date of previous occurrence 2018
Manifestation of disease Clinical disease
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)
New outbreaks (4)
Outbreak 1 (S4) Stearns County, Stearns, Minnesota
Date of start of the outbreak 23/10/2018
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 43000
Affected population Commercial meat-type turkey flock
Outbreak 2 (S2) Stearns County, Stearns, Minnesota
Date of start of the outbreak 31/10/2018
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 24000
Affected population Commercial meat-type turkey flock
Outbreak 3 (K2) Kandiyohi County, Kandiyohi, Minnesota
Date of start of the outbreak 31/10/2018
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 50000
Affected population Commercial meat-type turkey flock
Outbreak 4 (S3) Stearns County, Stearns, Minnesota
Date of start of the outbreak 01/11/2018
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 61000
Affected population Commercial meat-type turkey flock
Summary of outbreaks Total outbreaks: 4
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 178000 **
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds ** ** ** **
*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 November 8, 2018 update: The Minnesota Board of Animal Health (BAH) and USDA, Animal and Plant Health Inspection Services (APHIS) are conducting an epidemiological investigation of the events and have increased surveillance as a result of these detections. State officials have quarantined the affected premises and implemented movement controls. Turkeys from all infected premises will be depopulated through controlled marketing. Increased surveillance detected H5N2 low pathogenic avian influenza (LPAI) in four additional commercial meat-type turkey flocks within the control areas. North American H5N2 low pathogenicity avian influenza of wild bird lineage was determined from partial HA/NA sequencing and is consistent with the index premises infection. Full sequencing of the virus from the index premises showed all gene segments are consistent with North American wild bird lineage H5N2 low pathogenic avian influenza (LPAI) virus.
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 prohibited
  • 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) 01/11/2018 Positive
Minnesota Poultry Testing Laboratory (Local laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 02/11/2018 Positive
Minnesota Poultry Testing Laboratory (Local laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 03/11/2018 Positive
National Veterinary Services Laboratories (NVSL) (National laboratory) Birds nucleotide sequencing 02/11/2018 Positive
National Veterinary Services Laboratories (NVSL) (National laboratory) Birds nucleotide sequencing 05/11/2018 Positive
National Veterinary Services Laboratories (NVSL) (National laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 02/11/2018 Positive
National Veterinary Services Laboratories (NVSL) (National laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 05/11/2018 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations