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SARS-CoV-2/COVID-19,
United States of America
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Information received on 27/11/2020 from Dr Mark Davidson, Associate Administrator, USDA-APHIS,
United States
Department of Agriculture, Washington, United States of America
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Summary
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| 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 |
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2 |
0 |
0 |
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| Affected population |
Domestic American Mink (Neovison vison) on a commercial farm |
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| Summary of outbreaks |
Total outbreaks: 1 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| American Mink:Neovison vison(Mustelidae) |
12000 |
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2 |
0 |
0 |
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| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| American Mink:Neovison vison(Mustelidae) |
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0.02% |
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0.02% |
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| *Removed from the susceptible population through death, destruction and/or slaughter |
| **Not calculated because of missing information |
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Epidemiology
| Source of the outbreak(s) or origin of infection |
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Suspected human transmission
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| 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. |
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Control measures
| Measures applied |
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Quarantine
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Disinfection
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Vaccination permitted (if a vaccine exists)
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No treatment of affected animals
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| Measures to be applied |
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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 |
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Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. |
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Map of outbreak locations
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