|
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 |
|
|
|
| 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 |
|
| 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 |
|
|
|
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
|
|