Bovine spongiform encephalopathy,
Brazil
Information received on 02/05/2014 from Dr Figueiredo Marques Guilherme Henrique , Director, Departamento de Saúde Animal , Ministério da Agricultura, Pecuaria e Abastecimento , Brasilia, Brazil
Summary
Report type Immediate notification (Final report)
Date of start of the event 19/03/2014
Date of confirmation of the event 14/04/2014
Report date 02/05/2014
Date submitted to OIE 02/05/2014
Date event resolved 01/05/2014
Reason for notification Recurrence 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 (1)
Outbreak 1 Porto Esperidião, MATO GROSSO
Date of start of the outbreak 19/03/2014
Outbreak status Resolved (01/05/2014)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 1177 1 0 50 0
Buffaloes 11 0 0 0 0
Affected population A 12-year-old female bovine tested during emergency slaughter at the slaughterhouse. The animal was born and raised on a full-cycle beef farm on extensive grazing, with a population of 1,177 cattle and 11 buffaloes.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of 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
  • Screening
  • Quarantine
  • Modified stamping out
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
National Agricultural Laboratory (LANAGRO/PE) (National laboratory) Cattle immunohistochemical test 14/04/2014 Positive
National Agricultural Laboratory (LANAGRO/PE) (National laboratory) Cattle immunohistochemical test 01/05/2014 Negative
Animal Health and Veterinary Laboratories Agency (AHVLA), Weybridge, United Kingdom (OIE Reference Laboratory) Cattle immunohistochemical test 01/05/2014 Positive
Future Reporting
The event is resolved. No more reports will be submitted.
Map of outbreak locations