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 (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 (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