Rabbit haemorrhagic disease,
Mexico
Information received on 17/06/2020 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. 7
Date of start of the event 03/04/2020
Date of confirmation of the event 08/04/2020
Report date 17/06/2020
Date submitted to OIE 17/06/2020
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)
New outbreaks (9)
Outbreak 1 La Cruz, Chihuahua
Date of start of the outbreak 29/05/2020
Outbreak status Resolved (01/06/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 31 24 24 7 0
Affected population A backyard with 31 rabbits for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (final squeaking). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 2 Meoqui, Chihuahua
Date of start of the outbreak 29/05/2020
Outbreak status Resolved (13/06/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 25 20 20 5 0
Affected population A backyard with 25 rabbits for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (final squeaking). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 3 Comondú, Baja California Sur
Date of start of the outbreak 30/05/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 240 225 225 15 0
Affected population A backyard with 240 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (final squeaking). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 4 Comondú, Baja California Sur
Date of start of the outbreak 30/05/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 144 117 117 27 0
Affected population A backyard with 144 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (bloody and foamy nasal discharge, final squeaking). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 5 Ensenada, Baja California
Date of start of the outbreak 31/05/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 8 4 4 4 0
Affected population A backyard with 8 rabbits for meat production, detected by notification due to sudden mortality in animals. Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 6 Chihuahua, Chihuahua
Date of start of the outbreak 02/06/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 40 40 20 20 0
Affected population A backyard with 40 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (bloody and foamy nasal discharge, final squeaking). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 7 Rosario, Chihuahua
Date of start of the outbreak 02/06/2020
Outbreak status Resolved (16/06/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 16 13 13 3 0
Affected population A backyard with 16 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (bloody and foamy nasal discharge, final squeaking). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 8 Playas de Rosarito, Baja California
Date of start of the outbreak 03/06/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 9 4 3 6 0
Affected population A backyard with 9 rabbits, these are pet animals, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (final squeaking). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 9 Tecate, Baja California
Date of start of the outbreak 11/06/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 53 47 47 6 0
Affected population A backyard with 53 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (bloody and foamy nasal discharge, final squeaking). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Summary of outbreaks Total outbreaks: 9
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 566 494 473 93 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Rabbits 87.28% 83.57% 95.75% 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, affected backyards were identified: four in Chihuahua, three in Baja California and two in Baja California Sur. The backyards have been depopulated and cleaning and desinfection 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