Rabbit haemorrhagic disease,
Mexico
Information received on 23/07/2020 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. 11
Date of start of the event 03/04/2020
Date of confirmation of the event 08/04/2020
Report date 22/07/2020
Date submitted to OIE 23/07/2020
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)
New outbreaks (6)
Outbreak 1 La Paz, Baja California Sur
Date of start of the outbreak 07/07/2020
Outbreak status Resolved (11/07/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Black-tailed Jackrabbit:Lepus californicus(Leporidae) 1 1 1 0 0
Affected population Hare found dead. Samples were collected, which were positive for rabbit hemorrhagic disease by HA and RT-PCR technique.
Outbreak 2 Comondú, Baja California Sur
Date of start of the outbreak 07/07/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 60 0 60 0
Affected population Backyard farm with 60 rabbits for meat production, detected by epidemiological surveillance in the area. Samples were collected and tested positive for rabbit haemorrhagic disease using the HA and RT-PCR technique.
Outbreak 3 Villa de Cos, Zacatecas
Date of start of the outbreak 08/07/2020
Outbreak status Resolved (09/07/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Black-tailed Jackrabbit:Lepus californicus(Leporidae) 1 1 1 0 0
Affected population Hare found dead. Samples were collected, which were positive for rabbit hemorrhagic disease by HA and RT-PCR technique.
Outbreak 4 La Paz, Baja California Sur
Date of start of the outbreak 10/07/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 25 10 10 15 0
Affected population Backyard farm with 25 animals for meat production, detected by a notification due to the presence of clinical signs (bloody and foamy nasal discharge, excitation and incoordination) and sudden animal mortality. Samples were collected and tested positive for haemorrhagic disease in rabbits by HA and RT-PCR techniques.
Outbreak 5 La Paz, Baja California Sur
Date of start of the outbreak 10/07/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 25 3 3 22 0
Affected population Backyard with 25 rabbits for meat production, detected by a notification due to sudden animal mortality . Samples were collected, which were positive for rabbit haemorrhagic disease by HA and RT-PCR technique.
Outbreak 6 Mazapil, Zacatecas
Date of start of the outbreak 11/07/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rabbits 10 2 2 8 0
Affected population Backyard farm with ten animals for meat production, detected by a notification due to the presence of clinical signs suggestive of the disease (severe respiratory signs and bloody-foamy nasal discharge). Samples were collected and tested positive for rabbit haemorrhagic disease by HA and RT-PCR techniques.
Summary of outbreaks Total outbreaks: 6
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Black-tailed Jackrabbit:Lepus californicus(Leporidae) 2 2 2 0 0
Rabbits 120 15 ** 15 105 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% 100.00% 100.00% 100.00%
Rabbits ** 12.50% ** 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 On the basis of epidemiological traceability and promotion of notification, three affected farms were located in South Lower California and one in Zacatecas, and two dead hares were also located, one in each state mentioned. The farms have been depopulated and are being cleaned and disinfected. Active surveillance continues in these states for possible new cases. Producers in the region have been advised to immediately inform the official veterinary staff of the presence of characteristic signs of rabbit haemorrhagic disease or any dead wild animals in the region, and to avoid movement 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