Switzerland - 1 new outbreak of Bovine spongiform encephalopathy (atypical BSE type L) in cow on farm, Einsiedeln, Schwyz (OIE, February 5, 2020)

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[TD="width: *, align: left"]Bovine spongiform encephalopathy,
Switzerland[/TD]
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[TD]Information received on 05/02/2020 from Mr Hans Wyss, Chief Veterinary Officer, Schwarzenburgstrasse 161, Swiss Federal Veterinary Office, LIEBEFELD BERNE, Switzerland[/TD]
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[TD]Summary

[TD="width: 10%"]Report type[/TD]
[TD="width: 30%"]Immediate notification (Final report)[/TD]

[TD="width: 10%"]Date of start of the event[/TD]
[TD="width: 30%"]29/01/2020[/TD]

[TD="width: 10%"]Date of confirmation of the event[/TD]
[TD="width: 30%"]03/02/2020[/TD]

[TD="width: 10%"]Report date[/TD]
[TD="width: 30%"]05/02/2020[/TD]

[TD="width: 10%"]Date submitted to OIE[/TD]
[TD="width: 30%"]05/02/2020[/TD]

[TD="width: 10%"]Date event resolved[/TD]
[TD="width: 30%"]03/02/2020[/TD]

[TD="width: 10%"]Reason for notification[/TD]
[TD="width: 30%"]Recurrence of a listed disease[/TD]

[TD="width: 10%"]Date of previous occurrence[/TD]
[TD="width: 30%"]03/2012[/TD]

[TD="width: 10%"]Manifestation of disease[/TD]
[TD="width: 30%"]Clinical disease[/TD]

[TD="width: 10%"]Causal agent[/TD]
[TD="width: 30%"]Prion (atypical BSE type L)[/TD]

[TD="width: 10%"]Nature of diagnosis[/TD]
[TD="width: 30%"]Laboratory (advanced)[/TD]

[TD="width: 10%"]This event pertains to[/TD]
[TD="width: 30%"]the whole country[/TD]

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[TD]New outbreaks (1)

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Einsiedeln, Schwyz
Date of start of the outbreak	29/01/2020
Outbreak status	Resolved (03/02/2020)
Epidemiological unit	Farm
Affected animals	Species Susceptible Cases Deaths Killed and disposed of Slaughtered Cattle 68 1 0 0 1

[TD="align: left"]Outbreak 1[/TD]

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Total outbreaks: 1
Total animals affected	Species Susceptible Cases Deaths Killed and disposed of Slaughtered Cattle 68 1 0 0 1
Outbreak statistics	Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Cattle 1.47% 0.00% 0.00% 1.47%

[TD="align: left"]Summary of outbreaks[/TD]

[TD="colspan: 2"]*Removed from the susceptible population through death, destruction and/or slaughter[/TD]

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[TD]Epidemiology

Source of the outbreak(s) or origin of infection

Unknown or inconclusive

Epidemiological comments

Confirmation of atypical Bovine spongiform encephalopathy (BSE) in a cow on 3 February 2020. The 13 year old cow from a holding in the Canton of Schwyz was subject to emergency-slaughter on 23 January 2020. Samples of the brain stem were sent in for analysis and confirmed at the Swiss National Reference Laboratory for Transmissible Spongiform Encephalopathies. The sample tested positive in the rapid test for BSE "Priostrip BSE" and was confirmed by Western lmmunoblot. The pathological prion protein could be classified as (L) -Type BSE and therefore as an atypical case of BSE. The entire carcass was disposed of as category 1 material.

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[TD]Control measures

Measures applied	Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures

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[TD]Diagnostic test results

Laboratory name and type	Species	Test	Test date	Result
National Reference Laboratory (National laboratory)	Cattle	western blot	03/02/2020	Positive

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[TD]Future Reporting

The event is resolved. No more reports will be submitted.

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https://www.oie.int/wahis_2/public/...?page_refer=MapFullEventReport&reportid=33179