SARS-CoV-2/COVID-19,
United States of America
Information received on 23/07/2020 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. 11
Date of start of the event 27/03/2020
Date of confirmation of the event 04/04/2020
Report date 23/07/2020
Date submitted to OIE 23/07/2020
Reason for notification Emerging disease
Morbidity 2 (scale 0 to 5)
Mortality 0 (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)
New outbreaks (2)
Outbreak 1 Brazos County, Brazos, Texas
Date of start of the outbreak 28/06/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Dogs 2 0 0 0 0
Cats 1 1 0 0 0
Affected population Pet domestic cat (Felis catus) in a residential household
Outbreak 2 Maricopa County, Maricopa, Arizona
Date of start of the outbreak 10/07/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Dogs 3 1 0 0 0
Cats 1 0 0 0 0
Affected population Pet domestic dog (Canis lupus familiaris) in a residential household
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Dogs 5 1 0 0 0
Cats 2 1 0 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Dogs 20.00% 0.00% 0.00% 0.00%
Cats 50.00% 0.00% 0.00% 0.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Suspected human transmission
Epidemiological comments 23 Jul 2020 Update-- Arizona (AZ): A domestic dog from a known positive COVID-19 household was confirmed positive for SARS-CoV-2 at the National Veterinary Services Laboratories based upon molecular testing (PCR and sequencing). The affected dog exhibited respiratory clinical signs, but has since reportedly recovered. Texas (TX): A domestic cat from a known positive COVID-19 household was confirmed positive for SARS-CoV-2 at the National Veterinary Services Laboratories based upon molecular testing (PCR and sequencing). The cat showed no clinical signs and continues to be asymptomatic. Two dogs residing in the same household have remained asymptomatic and tested negative for SARS-CoV-2 by PCR. Samples for this case were collected as part of planned and targeted active surveillance of a specific animal, 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. Virus neutralizing antibodies in the absence of other positive test results have been detected in the following animals (listed by state): 1. 4 cats and 2 dogs from four households (UT)** 2. 2 dogs from different households (WI)** 3. 1 dog (NC)* As of 23 Jul 2020, total number of animals with detections of virus neutralizing antibody only: 12 *Animal had exposure to a probable or confirmed human with COVID-19 ** Samples collected as part of planned and targeted active surveillance of a specific animal, 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) Cats gene sequencing 21/07/2020 Positive
National Veterinary Services Laboratories (National laboratory) Cats real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 21/07/2020 Positive
National Veterinary Services Laboratories (National laboratory) Cats virus neutralisation test (VNT) 22/07/2020 Positive
National Veterinary Services Laboratories (National laboratory) Dogs gene sequencing 15/07/2020 Positive
National Veterinary Services Laboratories (National laboratory) Dogs real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 15/07/2020 Positive
National Veterinary Services Laboratories (National laboratory) Dogs virus neutralisation test (VNT) 22/07/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations