Rabbit haemorrhagic disease,
Mexico
Information received on 29/10/2020 from Dr. Gay Gutiérrez Juan, Director General de Salud Animal, Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria (SENASICA), Secretaría de Agricultura y Desarrollo Rural (SADER), Ciudad de Mexico, Mexico
Summary
Report type Follow-up report No. 20
Date of start of the event 03/04/2020
Date of confirmation of the event 08/04/2020
Report date 28/10/2020
Date submitted to OIE 29/10/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 1991
Manifestation of disease Clinical disease
Causal agent Rabbit haemorrhagic disease virus
Serotype RHDV2
Nature of diagnosis Clinical, Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (09/04/2020)
Follow-up report No. 1 (22/04/2020)
Follow-up report No. 2 (04/05/2020)
Follow-up report No. 3 (15/05/2020)
Follow-up report No. 4 (25/05/2020)
Follow-up report No. 5 (29/05/2020)
Follow-up report No. 6 (09/06/2020)
Follow-up report No. 7 (17/06/2020)
Follow-up report No. 8 (24/06/2020)
Follow-up report No. 9 (01/07/2020)
Follow-up report No. 10 (14/07/2020)
Follow-up report No. 11 (22/07/2020)
Follow-up report No. 12 (29/07/2020)
Follow-up report No. 13 (04/08/2020)
Follow-up report No. 14 (18/08/2020)
Follow-up report No. 15 (26/08/2020)
Follow-up report No. 16 (18/09/2020)
Follow-up report No. 17 (25/09/2020)
Follow-up report No. 18 (05/10/2020)
Follow-up report No. 19 (14/10/2020)
Follow-up report No. 20 (28/10/2020)
Follow-up report No. 21 (17/11/2020)
New outbreaks (5)
Outbreak 1 Venado, San Luis Potosi
Date of start of the outbreak 09/10/2020
Outbreak status Resolved (14/10/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 24 24 24 0 0
Affected population A backyard with 24 rabbits, these are pet animals, detected by notification due to the presence of clinical signs (hemorrhagic rhinitis, bloody and foamy nasal discharge, excitation, incoordination, sero-mucopurulent nasal discharge, dyspnoea) and sudden death of the animals. Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 2 Aguascalientes, Aguascalientes
Date of start of the outbreak 13/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Zoo
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 9 7 7 2 0
Affected population A zoo with 9 rabbits for breeding, detected by notification due to the presence of clinical signs (bloody and foamy nasal discharge) and sudden death of the animals. Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 3 Ensenada, Baja California
Date of start of the outbreak 15/10/2020
Outbreak status Resolved (16/10/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 8 8 8 0 0
Affected population A backyard with 8 rabbits, these are pet animals, detected by notification due to the presence of clinical signs suggesting the disease (bloody and foamy nasal discharge) as well as sudden death of the animals. Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 4 Arteaga, Coahuila
Date of start of the outbreak 16/10/2020
Outbreak status Resolved (22/10/2020)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Black-tailed Jackrabbit:Lepus californicus(Leporidae) 1 1 1 0 0
Affected population A wild rabbit found dead. Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 5 Salinas, San Luis Potosi
Date of start of the outbreak 19/10/2020
Outbreak status Resolved (22/10/2020)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Desert Cottontail:Sylvilagus audubonii(Leporidae) 1 1 1 0 0
Affected population A wild rabbit found dead. Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Summary of outbreaks Total outbreaks: 5
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 41 39 39 2 0
Black-tailed Jackrabbit:Lepus californicus(Leporidae) 1 1 1 0 0
Desert Cottontail:Sylvilagus audubonii(Leporidae) 1 1 1 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Rabbits 95.12% 95.12% 100.00% 100.00%
Black-tailed Jackrabbit:Lepus californicus(Leporidae) 100.00% 100.00% 100.00% 100.00%
Desert Cottontail:Sylvilagus audubonii(Leporidae) 100.00% 100.00% 100.00% 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments Following epidemiological tracing and increased notification, one backyard in San Luis Potosí, a zoo in Aguascalientes, another backyard in Baja California were identified as affected by the disease, as well as two wild rabbits in San Luis Potosí and Coahuila. The premises have been depopulated and cleaning and disinfection are on-going. Active surveillance continues in these States for new cases. It was recommended that producers in the area immediately inform official veterinary personnel of the presence of typical signs of rabbit haemorraghic disease or of any wild animals found dead in the area, as well as avoid movements of rabbits.
Control measures
Measures applied
  • Surveillance within containment and/or protection zone
  • Quarantine
  • Official disposal of carcasses, by-products and waste
  • Stamping out
  • Disinfection
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • Surveillance outside containment and/or protection zone
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations