Rabbit haemorrhagic disease,
Mexico
Information received on 04/05/2020 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. 2
Date of start of the event 03/04/2020
Date of confirmation of the event 08/04/2020
Report date 04/05/2020
Date submitted to OIE 04/05/2020
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 Not typed
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 (10)
Outbreak 1 Nuevo Casas Grandes, Chihuahua
Date of start of the outbreak 18/04/2020
Outbreak status Resolved (21/04/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 47 38 38 9 0
Affected population A backyard with 47 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (haemorraghic rhinitis, sudden death). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 2 Allende, Chihuahua
Date of start of the outbreak 19/04/2020
Outbreak status Resolved (23/04/2020)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Desert Cottontail:Sylvilagus audubonii(Leporidae) 1 1 0 0
Affected population A wild leporidae found dead and notified to the authorities. Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 3 Chihuahua, Chihuahua
Date of start of the outbreak 20/04/2020
Outbreak status Resolved (25/04/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 60 20 20 40 0
Affected population A backyard with 60 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (final squeaking, sudden death). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 4 Chihuahua, Chihuahua
Date of start of the outbreak 20/04/2020
Outbreak status Resolved (24/04/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 45 25 25 20 0
Affected population A backyard with 45 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (sudden death). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 5 Allende, Chihuahua
Date of start of the outbreak 20/04/2020
Outbreak status Resolved (29/04/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 28 4 3 25 0
Affected population A backyard with 28 animals for reproduction/breeding, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (severe respiratory problems, sudden death). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination inhibition, haemagglutination and RT-PCR diagnostic tests.
Outbreak 6 Camargo, Chihuahua
Date of start of the outbreak 21/04/2020
Outbreak status Resolved (23/04/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 41 41 17 24 0
Affected population A backyard with 41 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (severe respiratory problems, sudden death). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination inhibition, haemagglutination and RT-PCR diagnostic tests.
Outbreak 7 López, Chihuahua
Date of start of the outbreak 22/04/2020
Outbreak status Resolved (29/04/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 54 37 37 17 0
Affected population A backyard with 54 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (severe respiratory problems, sudden death). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 8 Jiménez, Chihuahua
Date of start of the outbreak 22/04/2020
Outbreak status Resolved (25/04/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 42 30 30 12 0
Affected population A backyard with 42 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (sudden death). Samples were collected that tested positive to rabbit haemorrhagic disease with RT-PCR diagnostic test.
Outbreak 9 Cajeme, Sonora
Date of start of the outbreak 23/04/2020
Outbreak status Resolved (26/04/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 22 9 9 13 0
Affected population A backyard with 22 rabbits, these are pet animals, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (dyspnea, sudden death). Samples were collected that tested positive to rabbit haemorrhagic disease with RT-PCR diagnostic test.
Outbreak 10 Ahumada, Chihuahua
Date of start of the outbreak 24/04/2020
Outbreak status Resolved (28/04/2020)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Black-tailed Jackrabbit:Lepus californicus(Leporidae) 1 1 0 0
Affected population A wild leporidae found dead and notified to the authorities. Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Summary of outbreaks Total outbreaks: 10
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 339 204 179 160 0
Desert Cottontail:Sylvilagus audubonii(Leporidae) 1 1 0 0
Black-tailed Jackrabbit:Lepus californicus(Leporidae) 1 1 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Rabbits 60.18% 52.80% 87.75% 100.00%
Desert Cottontail:Sylvilagus audubonii(Leporidae) ** ** 100.00% **
Black-tailed Jackrabbit:Lepus californicus(Leporidae) ** ** 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 Following the epidemiological tracing carried out, backyards with rabbits showing clinical signs compatibles with rabbit hemorrhagic disease were identified in the municipalities of Nuevo Casas Grandes, Chihuahua, Allende, Camargo, Jiménez and López, in the state of Chihuahua. Likewise, the first outbreak was detected in the state of Sonora, specifically in the municipality of Cajeme. Backyards affected have been depopulated and are currenlty being cleaned and disinfected. The perifocal area has been expanded and surveillance continues for possible 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 any dead wild animals in the area, as well as avoiding movements of rabbits.
Control measures
Measures applied
  • Surveillance within containment and/or protection zone
  • Quarantine
  • Disinfection
  • Stamping out
  • Official disposal of carcasses, by-products and waste
  • 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