SARS-CoV-2/COVID-19,
United States of America
Information received on 16/10/2020 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. 22
Date of start of the event 27/03/2020
Date of confirmation of the event 04/04/2020
Report date 16/10/2020
Date submitted to OIE 16/10/2020
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)
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)
New outbreaks (1)
Outbreak 1 Utah, Utah
Date of start of the outbreak 29/09/2020
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) 300 126 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) 300 ** 126 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
American Mink:Neovison vison(Mustelidae) ** 42.00% ** 42.00%
*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
  • Suspected human transmission
Epidemiological comments 16 Oct 2020 Update-- Utah (UT): Following increased mortality rates, domestic American Mink (Neovison vison) from one commercial premises were confirmed positive for SARS-CoV-2 at the National Veterinary Services Laboratories based upon molecular testing results (PCR and sequencing) and meeting case definition. Confirmed cases of SARS-CoV-2 in domestic mink from the United States have now been identified on 11 commercial premises. Clinical signs included open-mouth breathing and sudden death. The affected premises reported a confirmed positive case of COVID-19 in a person that was in contact with the mink. State Officials in Utah have quarantined the premises and are working closely with federal One Health partners to 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 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 the affected populations are domesticated American Mink (Neovison vison) from commercial premises as stated above. Texas (TX): Four cats from Somervell County who are housemates to the confirmed positive cat case have tested positive for SARS-CoV-2 virus neutralizing antibodies. Virus neutralizing antibodies in the absence of other positive test results have been detected in the following animals (listed by state): 1. 3 cats from two households (TX)** As of 15 Oct 2020, total number of animals with detections of virus neutralizing antibody in the absence of other positive test results:41 **Samples collected as part of planned and targeted active surveillance of specific animals, with known or suspected exposures to a person with COVID-19 or other exposure to SARS-CoV-2, to better understand risk factors for SARS-CoV-2 transmission.
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
National Veterinary Services Laboratories (National laboratory) American Mink gene sequencing 07/10/2020 Positive
National Veterinary Services Laboratories (National laboratory) American Mink real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 07/10/2020 Positive
National Veterinary Services Laboratories (National laboratory) Cats virus neutralisation test (VNT) 24/09/2020 Positive
National Veterinary Services Laboratories (National laboratory) Cats virus neutralisation test (VNT) 28/09/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations