Bovine spongiform encephalopathy, Brazil (OIE, May 5 2014)

[Giuseppe]

[Source: OIE, full page: (LINK). Edited.]


Bovine spongiform encephalopathy, Brazil


Information received on 02/05/2014 from Dr Figueiredo Marques Guilherme Henrique , Director, Departamento de Sa?de Animal , Minist?rio da Agricultura, Pecuaria e Abastecimento , Brasilia, Brazil

• Summary
  • Report type Immediate notification
  • Date of start of the event 19/03/2014
  • Date of pre-confirmation of the event 14/04/2014
  • Report date 02/05/2014
  • Date submitted to OIE 02/05/2014
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 19/12/2010
  • Manifestation of disease Sub-clinical infection
  • Causal agent Prion
  • Nature of diagnosis Laboratory (advanced)
  • This event pertains to the whole country
  
  
• New outbreaks
  • Summary of outbreaks
    • Total outbreaks: 1
      • Outbreak Location - MATO GROSSO ( Porto Esperidi?o )
        • Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • Cattle - 1177 - 1 - 0 - 50 - 0
          • Buffaloes - 11 - 0 - 0 - 0 - 0
      
      
    • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Cattle - 0.08% - 0.00% - 0.00% - 4.25%
      • Buffaloes - 0.00% - 0.00% - ? - 0.00%
      • * 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
  • As part of the Brazilian surveillance system for Bovine Spongiform Encephalopathy (BSE), the prion marker was identified on 14 April 2014 in a 12-year-old female bovine sent for emergency slaughter because she was found fallen at her arrival at the slaughterhouse following some problems during transport.
  • The animal was born and raised in the same full-cycle beef farm on extensive grazing.
  • Meat and other products from this animal did not enter the food chain and there was no risk for human population.
  • Tracing back animal movements since 2000, it was established that some animals from the birth cohort of this animal had been moved to 10 other properties in 3 municipalities in the state of Mato Grosso.
  • During the epidemiological investigation, 49 animals from the cohort, which did not show clinical signs of the disease, were destroyed.
  • Samples of nervous tissue were taken from the cohort animals and tested for BSE at the National Laboratory and all were negative on 1 May 2014.
  • All control measures according to the OIE Terrestrial Animal Health Code have already been applied in order to close the outbreak and only the results of the typing tests carried out at the Reference Laboratory at Weybridge (United Kingdom) are pending.
  
  
• Control measures
  • Measures applied
    • Quarantine
    • Screening
    • Modified stamping out
    • No vaccination
    • No treatment of affected animals
    
    
  • Measures to be applied
    • No other measures
  
  
• Diagnostic test results
  • Laboratory name and type - National Agricultural Laboratory (LANAGRO/PE) ( National laboratory )
    • Tests and results: Species - Test - Test date - Result
      • Cattle - immunohistochemical test - 14/04/2014 - Positive
      • Cattle - immunohistochemical test - 01/05/2014 - Negative
    
    
  • Laboratory name and type - Animal Health and Veterinary Laboratories Agency (AHVLA), Weybridge, United Kingdom ( OIE?s Reference Laboratory )
    • Tests and results: Species - Test - Test date - Result
      • Cattle - immunohistochemical test - 01/05/2014 - Positive
  
  
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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