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SARS-CoV-2/COVID-19, United States of America
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Information received on 23/07/2020 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 |
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 |
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Affected population |
Pet domestic cat (Felis catus) in a residential household |
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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 |
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Affected population |
Pet domestic dog (Canis lupus familiaris) in a residential household |
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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 |
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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% |
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*Removed from the susceptible population through death, destruction and/or slaughter |
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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 |
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.
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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 |
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 |
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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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