Rabbit haemorrhagic disease,
United States of America
Information received on 29/06/2020 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. 21
Date of start of the event 08/07/2019
Date of confirmation of the event 17/07/2019
Report date 29/06/2020
Date submitted to OIE 29/06/2020
Date event resolved 03/07/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 16/04/2019
Manifestation of disease Clinical disease
Causal agent Rabbit haemorrhagic disease virus
Serotype RHDV2
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (19/07/2019)
Follow-up report No. 1 (08/08/2019)
Follow-up report No. 2 (16/08/2019)
Follow-up report No. 3 (30/08/2019)
Follow-up report No. 4 (03/12/2019)
Follow-up report No. 5 (07/01/2020)
Follow-up report No. 6 (06/03/2020)
Follow-up report No. 7 (13/03/2020)
Follow-up report No. 8 (27/03/2020)
Follow-up report No. 9 (06/04/2020)
Follow-up report No. 10 (13/04/2020)
Follow-up report No. 11 (20/04/2020)
Follow-up report No. 12 (27/04/2020)
Follow-up report No. 13 (05/05/2020)
Follow-up report No. 14 (13/05/2020)
Follow-up report No. 15 (19/05/2020)
Follow-up report No. 16 (27/05/2020)
Follow-up report No. 17 (01/06/2020)
Follow-up report No. 18 (09/06/2020)
Follow-up report No. 19 (17/06/2020)
Follow-up report No. 20 (23/06/2020)
Follow-up report No. 21 (29/06/2020)
Follow-up report No. 22 (02/07/2020)
New outbreaks (1)
Outbreak 1 Sanpete County, Sanpete, Utah
Date of start of the outbreak 10/06/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 1200 400 800 0
Affected population Commercial domestic meat-type rabbits (Oryctolagus cuniculus)
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 1200 ** 400 800 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Rabbits ** 33.33% ** 100.00%
*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
  • Unknown or inconclusive
Epidemiological comments Update 29 June 2020: Utah (UT)--RHDV2 confirmed in domestic meat-type rabbits (Oryctolagus cuniculus) on one commercial premises in Sanpete County, Utah. This is the first detection of RHDV2 in Utah. State officials have quarantined the affected premises. Depopulation has been completed and disposal activities are pending. Utah State Animal Health Officials and the United States Department of Agriculture (USDA), Animal and Plant Health Inspection Services (APHIS) have begun an epidemiological investigation into the outbreak. California (CA)--California State Animal Health Officials and the USDA, APHIS continue an epidemiological investigation into the current outbreaks. Nevada (NV)--Nevada State Animal Health Officials and the USDA, APHIS continue an epidemiological investigation into the current outbreak. Colorado (CO)--Colorado State Animal Health Officials and USDA, APHIS continue an epidemiological investigation into the current outbreaks. Arizona (AZ)--Arizona State Animal Health Officials and the USDA, APHIS continue an epidemiological investigation into the current outbreaks. Texas (TX)--Texas State Animal Health Officials and the USDA, APHIS continue an epidemiological investigation into the current outbreaks. New Mexico (NM)--New Mexico State Animal Health Officials and the USDA, APHIS continue their epidemiological investigation into the current outbreaks. General clinical signs seen in confirmed cases from all the affected states include lethargy, seizures, and sudden death. All affected States have received or are pursuing import of European Union-licensed RHDV2 vaccine for emergency use by special approval of the USDA. Administration of RHDV2 vaccine has begun in New Mexico, Colorado, California and Texas. In all States, State Animal Health Officials direct the use of the vaccine including record and ID requirements.
Control measures
Measures applied
  • Vaccination in response to the outbreak (s)
  • Surveillance within containment and/or protection zone
  • Traceability
  • Quarantine
  • Disinfection
  • 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) Rabbits antigen (Ag) detection ELISA 22/06/2020 Positive
National Veterinary Services Laboratories (National laboratory) Rabbits reverse transcription - polymerase chain reaction (RT-PCR) 22/06/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations