Rabbit haemorrhagic disease,
Mexico
Information received on 24/06/2020 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. 8
Date of start of the event 03/04/2020
Date of confirmation of the event 08/04/2020
Report date 24/06/2020
Date submitted to OIE 24/06/2020
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)
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 (12)
Outbreak 1 Saucillo, Chihuahua
Date of start of the outbreak 04/06/2020
Outbreak status Resolved (16/06/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 42 42 13 29 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 (severe respiratory symptoms and final squeaking). Samples were collected that tested positive to rabbit haemorrhagic disease with with RT-PCR diagnostic test.
Outbreak 2 Chihuahua, Chihuahua
Date of start of the outbreak 04/06/2020
Outbreak status Resolved (26/06/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 20 20 10 10 0
Affected population A backyard with 20 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (respiratory symptoms, final squeaking). Samples were collected that tested positive to rabbit haemorrhagic disease with haemagglutination and RT-PCR diagnostic tests.
Outbreak 3 Valle de Zaragoza, Chihuahua
Date of start of the outbreak 06/06/2020
Outbreak status Resolved (19/06/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 20 6 6 14 0
Affected population A backyard with 20 animals for meat production, detected by notification due to sudden mortality in animals. Samples were collected that tested positive to rabbit haemorrhagic disease with RT-PCR diagnostic test.
Outbreak 4 Tecate, Baja California
Date of start of the outbreak 06/06/2020
Outbreak status Resolved (28/06/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 59 20 20 39 0
Affected population A backyard with 59 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (excitation et incoordination). Samples were collected that tested positive to rabbit haemorrhagic disease with RT-PCR diagnostic test.
Outbreak 5 Delicias, Durango
Date of start of the outbreak 09/06/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 63 63 1 62 0
Affected population A backyard with 63 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 RT-PCR diagnostic test.
Outbreak 6 Gómez Palacio, Durango
Date of start of the outbreak 10/06/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 120 120 35 85 0
Affected population A backyard with 120 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (severe respiratory symptoms, excitation and incoordination, final squeaking). Samples were collected that tested positive to rabbit haemorrhagic disease with with RT-PCR diagnostic test.
Outbreak 7 Meoqui, Chihuahua
Date of start of the outbreak 10/06/2020
Outbreak status Resolved (19/06/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 50 50 25 25 0
Affected population A backyard with 50 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (severe respiratory symptoms and final squeaking). Samples were collected that tested positive to rabbit haemorrhagic disease with with RT-PCR diagnostic test.
Outbreak 8 Ensenada, Baja California
Date of start of the outbreak 11/06/2020
Outbreak status Resolved (13/06/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 21 21 21 0 0
Affected population A backyard with 21 rabbits for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (excitation et incoordination). Samples were collected that tested positive to rabbit haemorrhagic disease with RT-PCR diagnostic test.
Outbreak 9 Ensenada, Baja California
Date of start of the outbreak 11/06/2020
Outbreak status Resolved (19/06/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 76 22 22 54 0
Affected population A backyard with 76 rabbits for meat production, detected by notification due to sudden mortality in animals. Samples were collected that tested positive to rabbit haemorrhagic disease with RT-PCR diagnostic test.
Outbreak 10 Ensenada, Baja California
Date of start of the outbreak 11/06/2020
Outbreak status Resolved (19/06/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 20 7 4 16 0
Affected population A backyard with 20 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 11 Mulegé, Baja California
Date of start of the outbreak 15/06/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 20 8 8 12 0
Affected population A backyard with 20 animals for meat production, detected by notification due to sudden mortality in animals. Samples were collected that tested positive to rabbit haemorrhagic disease with RT-PCR diagnostic test.
Outbreak 12 Ensenada, Baja California
Date of start of the outbreak 15/06/2020
Outbreak status Resolved (27/06/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 70 65 57 13 0
Affected population A backyard with 70 animals for meat production, detected by notification due to sudden mortality in animals and the presence of clinical signs suggesting the disease (, excitation, incoordination and final squeaking). Samples were collected that tested positive to rabbit haemorrhagic disease with RT-PCR diagnostic test.
Summary of outbreaks Total outbreaks: 12
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 581 444 222 359 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Rabbits 76.42% 38.21% 50.00% 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, affected backyards were identified: five in Baja California, one in Baja California Sur, four in Chihuahua and two in Durango . 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