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Rabbit haemorrhagic disease,
United States of America
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Information received on 22/04/2010 from Dr John Clifford, Official Delegate, Chief Trade Advisor, Animal and Plant Health Inspection Service,
United States Department of Agriculture, Washington, United States of America
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Summary
| Report type |
Immediate notification |
| Date of start of the event |
07/02/2010 |
| Date of confirmation of the event |
20/04/2010 |
| Report date |
22/04/2010 |
| Date submitted to OIE |
22/04/2010 |
| Date event resolved |
14/05/2010 |
| Reason for notification |
Recurrence of a listed disease |
| Date of previous occurrence |
28/03/2008 |
| Manifestation of disease |
Sub-clinical infection |
| Causal agent |
Rabbit haemorrhagic disease virus |
| Nature of diagnosis |
Laboratory (advanced) |
| This event pertains to |
the whole country |
| Related reports |
Immediate notification (22/04/2010)
Follow-up report No. 1 (18/05/2010)
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| Outbreak 1 |
Pine County, Pine County, Minnesota |
| Date of start of the outbreak |
07/02/2010 |
| Outbreak status |
Resolved (14/05/2010) |
| Epidemiological unit |
Farm |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Rabbits |
25 |
25 |
25 |
0 |
0 |
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| Affected population |
The index premises is a private residence that receives donated rabbits to use as a food source at a wildlife centre. This is a non-commercial incident. |
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| Summary of outbreaks |
Total outbreaks: 1 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Rabbits |
25 |
25 |
25 |
0 |
0 |
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| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Rabbits |
100.00% |
100.00% |
100.00% |
100.00% |
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| *Removed from the susceptible population through death, destruction and/or slaughter |
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Epidemiology
| Source of the outbreak(s) or origin of infection |
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| Epidemiological comments |
The USDA Animal Plant Health Inspection Services (APHIS) and the Minnesota Board of Animal Health are conducting a comprehensive epidemiological investigation of this event.
• Donated rabbits are received at a wildlife centre in Washington County then transferred to the index premises, a private residence, where they live until they are needed as a food source at the wildlife centre.
• Twenty rabbits died suddenly on the index premises approximately two months ago, and feed contamination was suspected as the cause of death. All new rabbits taken to the index premises after the initial rabbit deaths also died suddenly without exhibiting clinical signs.
• Tissue samples were submitted to a private laboratory which suspected rabbit haemorrhagic disease (RHD). Tissue samples were subsequently submitted to the National Veterinary Services Laboratories (NVSL) Foreign Animal Disease Diagnostic Laboratory (FADDL).
• Trapping or surveillance of free ranging rabbits will occur at the index premises and the wildlife centre. Note: in Minnesota the predominant wild rabbits are eastern cottontails and black-tailed jackrabbits, not known to be susceptible to RHD. |
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Control measures
| Measures applied |
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Disinfection / Disinfestation
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Quarantine
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Vaccination prohibited
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No treatment of affected animals
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| Measures to be applied |
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Diagnostic test results
| Laboratory name and type |
Species |
Test |
Test date |
Result |
| NVSL Foreign Animal Disease Diagnostic Laboratory (National laboratory) |
Rabbits |
antigen (Ag) detection ELISA |
20/04/2010 |
Positive |
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Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. |
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Map of outbreak locations
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