SARS-CoV-2/COVID-19,
United States of America
Information received on 27/11/2020 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. 26
Date of start of the event 27/03/2020
Date of confirmation of the event 04/04/2020
Report date 27/11/2020
Date submitted to OIE 27/11/2020
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 (04/05/2020)
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)
Follow-up report No. 20 (02/10/2020)
Follow-up report No. 21 (09/10/2020)
Follow-up report No. 22 (16/10/2020)
Follow-up report No. 23 (30/10/2020)
Follow-up report No. 24 (06/11/2020)
Follow-up report No. 25 (16/11/2020)
Follow-up report No. 26 (27/11/2020)
New outbreaks (1)
Outbreak 1 Oregon, Oregon
Date of start of the outbreak 22/10/2020
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) 12000 2 0 0
Affected population Domestic American Mink (Neovison vison) on a commercial farm
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
American Mink:Neovison vison(Mustelidae) 12000 ** 2 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
American Mink:Neovison vison(Mustelidae) ** 0.02% ** 0.02%
*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 27 Nov 2020 Update-- Oregon (OR): Domestic American Mink (Neovison vison) from a commercial premises were confirmed positive for SARS-CoV-2 at the National Veterinary Services Laboratories based upon molecular testing results (PCR and sequencing), meeting case definition. This is the first confirmed detection of SARS-CoV-2 in mink from Oregon. Reported clinical signs were inappetance, coughing and mild respiratory signs, including sneezing. Mortality rates on the affected premises have remained normal for this time of year and no respiratory or gastrointestinal signs have currently been observed. The colony is reported to be free of Aleutian Disease, making it unique amongst mink colonies in the United States affected to date. The affected premises reported positive COVID-19 humans that were in contact with the mink. State Officials in Oregon are working closely with Federal One Health partners to follow up and monitor the situation. Please note: To protect confidentiality of any data related to human cases, the location used for this outbreak is that of the Oregon Veterinary Diagnostic Laboratory (OVDL), where animal samples were first tested. Due to limitations with the WAHIS system, the map notation indicates disease outbreaks in wild mink, however the affected populations are domesticated American Mink (Neovison vison) from commercial premises as stated above.
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
Oregon Veterinary Diagnostic Laboratory (Local laboratory) American Mink real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 24/11/2020 Positive
National Veterinary Services Laboratories (National laboratory) American Mink gene sequencing 25/11/2020 Positive
National Veterinary Services Laboratories (National laboratory) American Mink real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 25/11/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations