Summary
Report type: immediate notification
Date of start of the event: 28 Feb 2021
Date of confirmation of the event: 7 Mar 2021
Reason for notification: recurrence of a listed disease
Date of previous occurrence: 31 May 2017
Reported on: 16 Mar 2021
Manifestation of disease: clinical disease
Causal agent: Highly pathogenic avian influenza virus
Serotype: H5N8
Nature of diagnosis: Laboratory (advanced)
This event pertains to a defined zone within the country.

New outbreaks (1)
Summary of outbreaks:
Total outbreaks: 1
Outbreak location: Podgraje, river Bosut, Nijemci,
Vukovarso-Srijemska
Date of start of the outbreak: 1 Mar 2021
Epidemiological unit: village
Affected animals:
Species / Susceptible / Cases / Deaths / Killed and disposed of /
Slaughtered-Killed for commercial use / Vaccinated
Mute swan (_Cygnus olor_): Anatidae-Anseriformes / - / 1 / 1 / 0 / 0 /
0
Affected population: One mute swan was found dead near river Bosut.
HPAI subtype H5N8 is confirmed.

Epidemiology
Source of the outbreak(s) or origin of infection: unknown or
inconclusive

Diagnostic test results
Laboratory name and type: Croatian Veterinary Institute - Poultry
Centre National Laboratory
Species / Test / Test date / Result
Mute swan / Reverse transcription-polymerase chain reaction (RT-PCR) /
1 Mar 2021 / Positive
Mute swan / Reverse transcription-polymerase chain reaction (RT-PCR) /
1 Mar 2021 / Positive