Bluetongue,
Croatia
Information received on 16/10/2020 from Dr Tatjana Karačić, Assistant Minister, Chief Veterinary Officer, Veterinary Services, Ministry of Agriculture, Zagreb, Croatia
Summary
Report type Immediate notification
Date of start of the event 06/10/2020
Date of confirmation of the event 15/10/2020
Report date 16/10/2020
Date submitted to OIE 16/10/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 01/06/2017
Manifestation of disease Sub-clinical infection
Causal agent Bluetongue virus
Serotype 4
Nature of diagnosis Laboratory (basic), Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (16/10/2020)
Follow-up report No. 1 (28/10/2020)
Follow-up report No. 2 (05/11/2020)
New outbreaks (4)
Outbreak 1 Bartici, Bartici, Labin, Istarska
Date of start of the outbreak 06/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 21 1 0 0 0
Outbreak 2 Majcani, Sveti Martin, Buzet, Istarska
Date of start of the outbreak 07/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 65 1 0 0 0
Outbreak 3 Sveti Martin, Sveti Martin, Buzet, Istarska
Date of start of the outbreak 07/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 10 1 0 0 0
Outbreak 4 Seljaci, Seljaci, Buzet, Istarska
Date of start of the outbreak 07/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 15 1 0 0 0
Summary of outbreaks Total outbreaks: 4
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 111 4 0 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Cattle 3.60% 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 In the framework of active surveillance, bluetongue was confirmed by RT- PCR (serotype 4) in four cattle originating from four different holdings in Istria county.
Control measures
Measures applied
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Vector surveillance
  • Disinfection
Diagnostic test results
Laboratory name and type Species Test Test date Result
Croatian Veterinary Institute (National laboratory) Cattle enzyme-linked immunosorbent assay (ELISA) 15/10/2020 Positive
Croatian Veterinary Institute (National laboratory) Cattle real-time PCR 15/10/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations