Bluetongue,
Croatia
Information received on 05/11/2020 from Dr Tatjana Karačić, Assistant Minister, Chief Veterinary Officer, Veterinary Services, Ministry of Agriculture, Zagreb, Croatia
Summary
Report type Follow-up report No. 2
Date of start of the event 06/10/2020
Date of confirmation of the event 03/11/2020
Report date 05/11/2020
Date submitted to OIE 05/11/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 01/06/2017
Manifestation of disease Clinical disease
Causal agent Bluetongue virus
Serotype 4
Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced)
This event pertains to the whole country
Related reports Immediate notification (16/10/2020)
Follow-up report No. 1 (28/10/2020)
Follow-up report No. 2 (05/11/2020)
Follow-up report No. 3 (27/11/2020)
Follow-up report No. 4 (03/12/2020)
Follow-up report No. 5 (14/12/2020)
Follow-up report No. 6 (21/12/2020)
Follow-up report No. 7 (22/01/2021)
New outbreaks (5)
Outbreak 1 Polje Cepic, Polje Cepic, Krsan, Istarska
Date of start of the outbreak 19/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 1079 1 0 0 0
Outbreak 2 Boljunsko Polje, Boljunsko Polje, Lupoglav, Istarska
Date of start of the outbreak 19/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 29 2 0 0 0
Outbreak 3 Cusi, Cusi, Cerovlje, Istarska
Date of start of the outbreak 19/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 55 1 0 0 0
Outbreak 4 Gromaca, Gromaca, Dubrovnik, Dubrovacko-Neretvanska
Date of start of the outbreak 22/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Sheep 11 1 0 0 0
Outbreak 5 Salakovci, Salakovci, Labin, Istarska
Date of start of the outbreak 28/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 18 1 0 0 0
Summary of outbreaks Total outbreaks: 5
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 1181 5 0 0 0
Sheep 11 1 0 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Cattle 0.42% 0.00% 0.00% 0.00%
Sheep 9.09% 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 (serotype 4) is confirmed by RT-PCR in 29 non- vaccinated cattle originating from 20 different holdings in Istria county. In Dubrovnik-Neretva county, on 3 November 2020, Bluetongue (serotype 4) was confirmed in one sheep with clinical signs.
Control measures
Measures applied
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Disinfection
  • Vector surveillance
Diagnostic test results
Laboratory name and type Species Test Test date Result
Croatian Veterinary Institute (National laboratory) Cattle real-time PCR 03/11/2020 Positive
Croatian Veterinary Institute (National laboratory) Sheep real-time PCR 03/11/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations