Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds),
Information received on 23/12/2020 from Dr Davide Lecchini, Chief Veterinary Officer, Directorate General for Veterinary Health and Veterinary MedicinalProducts (DGSAF), Ministry of Health, ROME, Italy
Report type Follow-up report No. 1
Date of start of the event 21/11/2020
Date of confirmation of the event 04/12/2020
Report date 23/12/2020
Date submitted to OIE 23/12/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 2006
Manifestation of disease Clinical disease
Causal agent Highly pathogenic influenza A virus
Serotype H5N1
Nature of diagnosis Clinical, Laboratory (advanced), Necropsy
This event pertains to a defined zone within the country
Related reports Immediate notification (16/12/2020)
Follow-up report No. 1 (23/12/2020)
Follow-up report No. 2 (30/12/2020)
Follow-up report No. 3 (11/01/2021)
New outbreaks (1)
Outbreak 1 (HPAIWB_11_2020_RO) ROVIGO - PORTO VIRO- VALLE CA'''''''' PASTA/1, ROVIGO, Veneto
Date of start of the outbreak 12/12/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Eurasian Wigeon:Anas penelope(Anatidae) 4 0 4 0
Affected population Highly pathogenic avian influenza H5N1 viruses have been detected in four wigeons (Mareca penelope), shot in a hunting area.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Eurasian Wigeon:Anas penelope(Anatidae) 4 0 4 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Eurasian Wigeon:Anas penelope(Anatidae) ** ** 0.00% **
*Removed from the susceptible population through death, destruction and/or slaughter
**Not calculated because of missing information
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments One highly pathogenic avian influenza H5N1 virus belonging to the B clade has been detected in a wigeon (Mareca penelope) sampled after being shot in a hunting area in the province of Venezia (Valle Drago, Jesolo) and in a common teal (Anas crecca) sampled intra vitam after being captured in the province of Venezia (Valle Figheri, Campagna Lupia). The HA sequence is closely related to those of HPAI strains currently circulating in Northern Europe. Characterization of the full genome is in progress.
Control measures
Measures applied
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Experimental Zooprophylactic Institute of the Venezie - Padova (National laboratory) Eurasian Wigeon polymerase chain reaction (PCR) 18/12/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations