Information received on 23/10/2018 from Mr Hans Wyss, Chief Veterinary Officer, Schwarzenburgstrasse 161, Swiss Federal Veterinary Office, LIEBEFELD BERNE, Switzerland
Report type Follow-up report No. 4
Date of start of the event 19/10/2017
Date of confirmation of the event 23/10/2017
Report date 22/10/2018
Date submitted to OIE 23/10/2018
Date event resolved 31/12/2018
Reason for notification Recurrence of a listed disease
Date of previous occurrence 03/2010
Manifestation of disease Sub-clinical infection
Causal agent Bluetongue virus
Serotype 8
Nature of diagnosis Laboratory (advanced)
This event pertains to the whole country
Related reports Immediate notification (03/11/2017)
Follow-up report No. 1 (11/09/2018)
Follow-up report No. 2 (19/09/2018)
Follow-up report No. 3 (15/10/2018)
Follow-up report No. 4 (22/10/2018)
Follow-up report No. 5 (02/11/2018)
Follow-up report No. 6 (12/11/2018)
Follow-up report No. 7 (20/11/2018)
Follow-up report No. 8 (26/11/2018)
Follow-up report No. 9 (04/12/2018)
Follow-up report No. 10 (10/12/2018)
Follow-up report No. 11 (17/12/2018)
Follow-up report No. 12 (28/12/2018)
Follow-up report No. 13 (08/01/2019)
Follow-up report No. 14 (01/02/2019)
Follow-up report No. 15 (01/02/2019)
Follow-up report No. 16 (09/04/2019)
New outbreaks (1)
Outbreak 1 (BT_2018_1_AG) Schupfart, Schupfart, Rheinfelden, Aargau
Date of start of the outbreak 12/10/2018
Outbreak status Resolved (31/12/2018)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Sheep 50 1 0 1 0
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Sheep 50 1 0 1 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Sheep 2.00% 0.00% 0.00% 2.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Source of the outbreak(s) or origin of infection
  • Vectors
Epidemiological comments Update 22.10.2018: On Friday 12 October 2018 the national reference laboratory confirmed BTV-8 by RT-qPCR in one ram from a holding with 50 sheep in Schupfart in the Canton of Aargau, close to the German border. The ram had inflamed muquous membrane(Conjunctivitis), showed Ataxia and other neurologic symptoms. lt was euthanized. The holding was placed under restriction and a part of the sheep living in close contact with the ram was subject to blood sampling. All animals tested revealed negative for presence of virus genome. Vaccination and treatment with insecticides has been performed.
Control measures
Measures applied
  • Movement control inside the country
  • Vaccination in response to the outbreak (s)
  • Surveillance outside containment and/or protection zone
  • Surveillance within containment and/or protection zone
  • Quarantine
  • Selective killing and disposal
  • Zoning
  • Disinfection
  • Control of vectors
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Institute of Virology and lmmunology (IVI) (National laboratory) Sheep reverse transcription - polymerase chain reaction (RT-PCR) 12/10/2018 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations