Bovine spongiform encephalopathy,
Brazil
Information received on 31/05/2019 from Dr Geraldo Marcos De Moraes, Director, Departamento de Salud Animal e Insumos Pecuarios, Ministerio de Agricultura,Ganadería y Abastecimiento, Brasilia , Brazil
Summary
Report type Immediate notification (Final report)
Date of start of the event 05/04/2019
Date of confirmation of the event 31/05/2019
Report date 31/05/2019
Date submitted to OIE 31/05/2019
Date event resolved 05/04/2019
Reason for notification Recurrence of a listed disease
Date of previous occurrence 02/05/2014
Manifestation of disease Sub-clinical infection
Causal agent Prion (atypical H-type BSE)
Nature of diagnosis Laboratory (advanced)
This event pertains to the whole country
New outbreaks (1)
Outbreak 1 Nova Canaă do Norte, Mato Grosso
Date of start of the outbreak 05/04/2019
Outbreak status Resolved (05/04/2019)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 22794 1 0 1 0
Affected population A 17-year-old beef cow - Nelore breed. The animal was born and raised on a full-cycle beef farm on extensive grazing.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 22794 1 0 1 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Cattle 0.00% 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), a 17-year-old beef cow that was found fallen during an ante-mortem inspection at slaughter was confirmed as a case of ‘atypical BSE’, classified as H-type. After screening tests performed by the National Laboratory of Pernambuco (LFDA/PE) indicated the presence of prion antigens, the samples were sent to the Canadian Food Inspection Agency (CFIA)’s OIE BSE reference laboratory in Lethbridge, Alberta, and the confirmation diagnostic test was concluded on 31 May 2019. This is the third case of ‘atypical BSE’ identified in more than 20 years of surveillance in Brazil. The last case has been detected in 2014. Specified Risk Material was duly removed and incinerated at the slaughterhouse. Meat and other products from this animal did not enter the food chain and pose no risk for human and ruminants populations. According to the OIE Terrestrial Code, for the purposes of official BSE risk status recognition, ‘atypical BSE’ is a condition believed to occur spontaneously in all cattle populations at a very low rate. Therefore, this event does not have any influence on official BSE risk status recognition of Brazil. This investigation was concluded.
Control measures
Measures applied
  • Screening
  • Traceability
  • Quarantine
  • Official disposal of carcasses, by-products and waste
  • Selective killing and disposal
  • 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
Federal Laboratory for Agricultural Defense, Pernambuco (LFDA/PE) (National laboratory) Cattle enzyme-linked immunosorbent assay (ELISA) 13/05/2019 Positive
CFIA’s laboratory in Lethbridge, Alberta, Canada (OIE Reference Laboratory) Cattle enzyme-linked immunosorbent assay (ELISA) 31/05/2019 Positive
CFIA’s laboratory in Lethbridge, Alberta, Canada (OIE Reference Laboratory) Cattle western blot 31/05/2019 Positive
Future Reporting
The event is resolved. No more reports will be submitted.
Map of outbreak locations