SARS-CoV-2/COVID-19,
United States of America
Information received on 20/08/2020 from Dr Mark Davidson, Associate Administrator, USDA-APHIS, United States Department of Agriculture, Washington, United States of America
Summary
Report type Follow-up report No. 15
Date of start of the event 27/03/2020
Date of confirmation of the event 04/04/2020
Report date 20/08/2020
Date submitted to OIE 20/08/2020
Reason for notification Emerging disease
Morbidity 2 (scale 0 to 5)
Mortality 1 (scale 0 to 5)
Zoonotic impact Zoonotic potential currently unknown
Causal agent SARS-CoV-2/COVID-19
Related reports Immediate notification (06/04/2020)
Follow-up report No. 1 (17/04/2020)
Follow-up report No. 2 (22/04/2020)
Follow-up report No. 3 (29/04/2020)
Follow-up report No. 4 (02/06/2020)
Follow-up report No. 5 (03/06/2020)
Follow-up report No. 6 (10/06/2020)
Follow-up report No. 7 (25/06/2020)
Follow-up report No. 8 (02/07/2020)
Follow-up report No. 9 (09/07/2020)
Follow-up report No. 10 (17/07/2020)
Follow-up report No. 11 (23/07/2020)
Follow-up report No. 12 (30/07/2020)
Follow-up report No. 13 (05/08/2020)
Follow-up report No. 14 (13/08/2020)
Follow-up report No. 15 (20/08/2020)
Follow-up report No. 16 (27/08/2020)
Follow-up report No. 17 (02/09/2020)
Follow-up report No. 18 (10/09/2020)
Follow-up report No. 19 (24/09/2020)
New outbreaks (2)
Outbreak 1 Utah, Utah
Date of start of the outbreak 26/07/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
American Mink:Neovison vison(Mustelidae) 20000 3524 0 0
Affected population Domestic American Mink (Neovison vison) on a commercial farm
Outbreak 2 Utah, Utah
Date of start of the outbreak 02/08/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
American Mink:Neovison vison(Mustelidae) 8983 1451 0 0
Affected population Domestic American Mink (Neovison vison) on a commercial farm
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
American Mink:Neovison vison(Mustelidae) 28983 ** 4975 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
American Mink:Neovison vison(Mustelidae) ** 17.17% ** 17.17%
*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
  • Suspected human transmission
Epidemiological comments 17 Aug 2020 Update-- Utah (UT): Following increased mortality rates, domestic American Mink (Neovison vison) from two commercial premises were confirmed positive for SARS-CoV-2 at the National Veterinary Services Laboratories based upon molecular testing (PCR and sequencing). These are the first confirmed cases of SARS-CoV-2 in mink from the United States. Clinical signs included respiratory signs and sudden death. The affected premises reported positive cases of COVID-19 in people that were in contact with the mink. State Officials in Utah have quarantined the premises and are working closely with federal One Health partners to complete disposal and monitor the situation. Mink mortality rates on both premises have since decreased, returning to normal levels. Please note: To protect any data related to human cases, the location used for these outbreaks is that of the Utah Veterinary Diagnostic Laboratory (UVDL), where animal testing samples were first collected. Due to limitations with the WAHIS system, the map notation indicates disease outbreaks in wild mink, however please note that the affected populations are domesticated animals.
Control measures
Measures applied
  • Quarantine
  • Disinfection
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Washington Animal Disease Diagnostic Laboratory (Local laboratory) American Mink real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 12/08/2020 Positive
National Veterinary Services Laboratories (National laboratory) American Mink gene sequencing 17/08/2020 Positive
National Veterinary Services Laboratories (National laboratory) American Mink real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 17/08/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations