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
Summary
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)
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)

2
0
2
0
Affected population
Highly pathogenic avian influenza H5N1 viruses have been detected in two 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)

2
0
2
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
Epidemiology
Source of the outbreak(s) or origin of infection
Unknown or inconclusive
Epidemiological comments
One highly pathogenic avian influenza H5N1 virus belonging to the 2.3.4.4 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.