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Bovine spongiform encephalopathy,
Spain
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Information received on 07/01/2021 from Dr Valentín Almansa, Director General, Sanidad de la Produccion Agraria,
Ministerio de Agricultura, Pesca y Alimentación, Madrid, Spain
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Summary
| Report type |
Immediate notification (Final report) |
| Date of start of the event |
21/12/2020 |
| Date of confirmation of the event |
23/12/2020 |
| Report date |
07/01/2021 |
| Date submitted to OIE |
07/01/2021 |
| Date event resolved |
23/12/2020 |
| Reason for notification |
Recurrence of a listed disease |
| Date of previous occurrence |
10/07/2019 |
| Manifestation of disease |
Sub-clinical infection |
| Causal agent |
Prion (atypical BSE type H) |
| Nature of diagnosis |
Laboratory (advanced) |
| This event pertains to |
a defined zone within the country |
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| Outbreak 1 |
Viniegra de Arriba, La Rioja |
| Date of start of the outbreak |
21/12/2020 |
| Outbreak status |
Resolved (23/12/2020) |
| Epidemiological unit |
Farm |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Cattle |
353 |
1 |
1 |
0 |
0 |
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| Summary of outbreaks |
Total outbreaks: 1 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Cattle |
353 |
1 |
1 |
0 |
0 |
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| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Cattle |
0.28% |
0.28% |
100.00% |
0.28% |
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| *Removed from the susceptible population through death, destruction and/or slaughter |
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Epidemiology
| Source of the outbreak(s) or origin of infection |
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| Epidemiological comments |
On 22 December 2020, the Central Veterinary Laboratory in Algete, Madrid (National Reference Laboratory for TSEs, accredited under UNE-EN ISO/IEC 17025 standard) received a nerve tissue sample suspected to be infected by bovine spongiform encephalopathy (BSE) from the Regional Laboratory for Animal Health in La Rioja, Finca “La Grajera” (official regional laboratory), after a positive result was obtained through a HerdCheck BSE Antigen Test Kit (Idexx Laboratories) rapid test. The National Reference Laboratory carried out the confirmation tests authorized according to EU Regulation No. 1148/2014. The selected test was the BioRad inmuno-blotting TeSeE Western Blot (Ref:3551169), with a positive result. Afterwards, tests for BSE strain discrimination were carried out through hybrid immunoblotting with antibodies against PrP, confirming atypical BSE (H type strain). The sample was taken within the national TSE surveillance program (sampling of dead or non-slaughtered for human consumption animals over 48 months old). The animal was a crossbred cow born on April 20th 2003. |
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Control measures
| Measures applied |
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Traceability
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Official destruction of animal products
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Official disposal of carcasses, by-products and waste
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Selective killing and disposal
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Disinfection
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Vaccination permitted (if a vaccine exists)
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No treatment of affected animals
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| Measures to be applied |
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Diagnostic test results
| Laboratory name and type |
Species |
Test |
Test date |
Result |
| Central Veterinary Laboratory in Algete (National laboratory) |
Cattle |
western blot |
23/12/2020 |
Positive |
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Future Reporting
| The event is resolved. No more reports will be submitted. |
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Map of outbreak locations
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