Bovine spongiform encephalopathy, United States of America
Information received on 26/04/2012 from Dr John Clifford, Deputy Administrator, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America
- Summary
- Report type Immediate notification
- Start date 19/04/2012
- Date of first confirmation of the event 23/04/2012
- Report date 26/04/2012
- Date submitted to OIE 26/04/2012
- Reason for notification Reoccurrence of a listed disease
- Date of previous occurrence 2006
- Manifestation of disease Sub-clinical infection
- Causal agent Prion (atypical BSE)
- Nature of diagnosis Laboratory (advanced)
- This event pertains to the whole country
- New outbreaks
- Outbreak 1 - Tulare, County, Tulare, County, CALIFORNIA
- Date of start of the outbreak 19/04/2012
- Outbreak status Continuing (or date resolved not provided)
- Epidemiological unit Farm
- Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
- Cattle - ? ? 1 - ? ? 1 ? 0
- Affected Population:
- As part of a targeted BSE surveillance at rendering facilities, a deceased dairy cow (10 years and seven months old) was tested for BSE.
- Outbreak 1 - Tulare, County, Tulare, County, CALIFORNIA
- Summary of outbreaks
- Total outbreaks: 1
- Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
- Cattle ? ** ? ** ? ** - **
- * 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
- Random mutation
- Source of the outbreak(s) or origin of infection
- Epidemiological comments
- As part of the United States targeted bovine spongiform encephalopathy (BSE) surveillance system a case of BSE classified as atypical was identified in a dead dairy cow that was to be rendered. The dead animal?s carcass will be destroyed.
- The cow was culled due to lameness.
- The identified animal was never presented for slaughter for human consumption, did not enter food supply channels, and at no time presented any risk to human health.
- An epidemiological investigation into the incident has been initiated.
- Movement controls have been placed on the index premises.
- As part of the United States targeted bovine spongiform encephalopathy (BSE) surveillance system a case of BSE classified as atypical was identified in a dead dairy cow that was to be rendered. The dead animal?s carcass will be destroyed.
- Control measures
- Measures applied
- Quarantine
- Screening
- No vaccination
- No treatment of affected animals
- Measures to be applied
- No other measures
- Measures applied
- Diagnostic test results
- Laboratory name and type University of California (Local laboratory)
- Tests and results: Species ? Test - Test date ? Result
- Cattle - enzyme-linked immunosorbent assay (ELISA) - 19/04/2012 - Doubtful (uncertain)
- Tests and results: Species ? Test - Test date ? Result
- Laboratory name and type National Veterinary Services Laboratories (NVSL) (National laboratory)
- Tests and results: Species ? Test - Test date ? Result
- Cattle - enzyme-linked immunosorbent assay (ELISA) - 21/04/2012 - Doubtful (uncertain)
- Cattle - immunohistochemical test - 23/04/2012 ? Positive
- Cattle - western blotting - 23/04/2012 ? Positive
- Tests and results: Species ? Test - Test date ? Result
- Laboratory name and type University of California (Local laboratory)
- Future Reporting
- The event is continuing. Weekly follow-up reports will be submitted.
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