Rabbit haemorrhagic disease,
United States of America
Information received on 04/01/2021 from Dr Mark Davidson, Associate Administrator, USDA-APHIS, United States Department of Agriculture, Washington, United States of America
Report type Follow-up report No. 1
Date of start of the event 03/12/2020
Date of confirmation of the event 16/12/2020
Report date 04/01/2021
Date submitted to OIE 04/01/2021
Reason for notification Recurrence of a listed disease
Date of previous occurrence 27/11/2020
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 (18/12/2020)
Follow-up report No. 1 (04/01/2021)
New outbreaks (1)
Outbreak 1 Lake County, Lake, Florida
Date of start of the outbreak 03/12/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 18 18 18 0 0
Affected population Non-commercial, meat-type domestic rabbits (Oryctolagus cuniculus)
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 18 18 18 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Rabbits 100.00% 100.00% 100.00% 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments 31 Dec 2020 Update-- Florida (FL): RHDV2 confirmed in meat-type domestic rabbits (Oryctolagus cuniculus) on one non-commercial premises in Lake County, Florida. This is the first detection of RHDV2 in domestic rabbits from Florida. Clinical signs included bleeding from the nose and sudden death. The affected premises has been quarantined. Florida 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.
Control measures
Measures applied
  • Surveillance within containment and/or protection zone
  • Quarantine
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Disinfection
Diagnostic test results
Laboratory name and type Species Test Test date Result
National Veterinary Services Laboratories (National laboratory) Rabbits antigen (Ag) detection ELISA 30/12/2020 Positive
National Veterinary Services Laboratories (National laboratory) Rabbits reverse transcription - polymerase chain reaction (RT-PCR) 30/12/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations