Bluetongue,
Croatia
Information received on 28/10/2020 from Dr Tatjana Karačić, Assistant Minister, Chief Veterinary Officer, Veterinary Services, Ministry of Agriculture, Zagreb, Croatia
Summary
Report type Follow-up report No. 1
Date of start of the event 06/10/2020
Date of confirmation of the event 23/10/2020
Report date 28/10/2020
Date submitted to OIE 28/10/2020
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 (12)
Outbreak 1 Gologorica, Gologorica, Cerovlje, Istarska
Date of start of the outbreak 12/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 8 1 0 0 0
Outbreak 2 Pula, Pula, Pula, Istarska
Date of start of the outbreak 15/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 121 1 0 0 0
Goats 5 0 0 0 0
Sheep 117 0 0 0 0
Outbreak 3 Grimalda, Grimalda, Cerovje, Istarska
Date of start of the outbreak 15/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 1 1 0 0 0
Outbreak 4 Letaj, Letaj, Kršan, Istarska
Date of start of the outbreak 16/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 117 1 0 0 0
Outbreak 5 Boljunsko Polje, Boljunsko Polje, Lupoglav, Istarska
Date of start of the outbreak 16/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 6 1 0 0 0
Outbreak 6 Paz, Paz, Cerovje, Istarska
Date of start of the outbreak 16/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 5 1 0 0 0
Outbreak 7 Jezenj, Jezenj, Pazin, Istarska
Date of start of the outbreak 16/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 5 2 0 0 0
Outbreak 8 Boljunsko Polje, Boljunsko Polje, Lupoglav, Istarska
Date of start of the outbreak 16/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 8 1 0 0 0
Outbreak 9 Mutvoran, Mutvoran, Marcana, Istarska
Date of start of the outbreak 16/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 16 1 0 0 0
Outbreak 10 Trviz, Trviž, Pazin, Istarska
Date of start of the outbreak 16/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 3 1 0 0 0
Outbreak 11 Boljunsko Polje, Boljunsko Polje, Lupoglav, Istarska
Date of start of the outbreak 17/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 107 6 0 0 0
Outbreak 12 Boljunsko Polje, Boljunsko Polje, Lupoglav, Istarska
Date of start of the outbreak 17/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 6 3 0 0 0
Summary of outbreaks Total outbreaks: 12
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 403 20 0 0 0
Goats 5 0 0 0 0
Sheep 117 0 0 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Cattle 4.96% 0.00% 0.00% 0.00%
Goats 0.00% 0.00% - 0.00%
Sheep 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 in 21 unvaccinated cattle originating from 12 different holdings in Istria county.
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 reverse transcription - polymerase chain reaction (RT-PCR) 23/10/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations