Rabbit haemorrhagic disease,
Mexico
Information received on 27/05/2020 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. 4
Date of start of the event 03/04/2020
Date of confirmation of the event 08/04/2020
Report date 25/05/2020
Date submitted to OIE 27/05/2020
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 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)
New outbreaks (9)
Outbreak 1 Coyame de Sotol, Chihuahua
Date of start of the outbreak 06/05/2020
Outbreak status Resolved (13/05/2020)
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 rabbit found dead and notified to the authorities. Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR.
Outbreak 2 Chihuahua, Chihuahua
Date of start of the outbreak 07/05/2020
Outbreak status Resolved (12/06/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 10 1 1 9 0
Affected population A backyard with 10 pet animals detected by notification due to sudden deaths and clinical signs suggesting the disease (terminal squeal). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR.
Outbreak 3 Hermosillo, Sonora
Date of start of the outbreak 08/05/2020
Outbreak status Resolved (17/05/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 9 2 2 7 0
Affected population A backyard with nine pet animals detected by notification due to sudden deaths and clinical signs suggesting the disease (dyspnea and terminal squeal). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR.
Outbreak 4 Delicias, Chihuahua
Date of start of the outbreak 08/05/2020
Outbreak status Resolved (13/05/2020)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Black-tailed Jackrabbit:Lepus californicus(Leporidae) 6 6 0 0
Affected population Six wild rabbits found dead and notified to the authorities. Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR.
Outbreak 5 Francisco I. Madero, Coahuila
Date of start of the outbreak 08/05/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 50 50 40 10 0
Affected population A backyard with 50 breeding rabbits detected by notification due to sudden deaths and clinical signs suggesting the disease (frothy and bloody nasal discharge and terminal squeal). Samples were collected that tested positive to rabbit haemorrhagic disease with RT-PCR.
Outbreak 6 Moctezuma, Sonora
Date of start of the outbreak 09/05/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 15 6 6 9 0
Affected population A backyard with 15 pet rabbits detected by notification due to sudden deaths and clinical signs suggesting the disease (dyspnea and terminal squeal). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR.
Outbreak 7 Lerdo, Durango
Date of start of the outbreak 10/05/2020
Outbreak status Resolved (13/05/2020)
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 rabbit found dead and notified to the authorities. Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR.
Outbreak 8 Matamoros, Coahuila
Date of start of the outbreak 11/05/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 100 80 80 20 0
Affected population A backyard with 100 pet rabbits detected by notification due to sudden deaths and clinical signs suggesting the disease (severe respiratory signs, excitation, incoordination and terminal squeal). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR.
Outbreak 9 Hermosillo, Sonora
Date of start of the outbreak 12/05/2020
Outbreak status Resolved (19/05/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 72 60 60 12 0
Affected population A backyard with 72 pet rabbits detected by notification due to sudden deaths and clinical signs suggesting the disease (dyspnea and terminal squeal). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR.
Summary of outbreaks Total outbreaks: 9
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Black-tailed Jackrabbit:Lepus californicus(Leporidae) 8 8 0 0
Rabbits 256 199 189 67 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Black-tailed Jackrabbit:Lepus californicus(Leporidae) ** ** 100.00% **
Rabbits 77.73% 73.83% 94.97% 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 epidemiological investigation and increased notification, some other premises with rabbits showing signs suggesting rabbit haemorrhagic disease were identified in municipalities of Chihuahua, Sonora, Coahuila and Durango. Serological and organ samples were taken and tested with haemagglutination, haemagglutination inhibition and RT-PCR (confirmation test). The affected premises have been depopulated and are being cleaned and disinfected. The perifocal area has been expanded and surveillance continues 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 dead wild animals 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
Diagnostic test results
Laboratory name and type Species Test Test date Result
SENASICA Biosafety Laboratory Level 3 (National laboratory) Rabbits virus sequencing 22/05/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations