Information received on 20/11/2020 from Dr Davide Lecchini, Chief Veterinary Officer, Directorate General for Veterinary Health and Veterinary MedicinalProducts (DGSAF), Ministry of Health, ROME, Italy
Summary
Report type Immediate notification
Date of start of the event 17/11/2020
Date of confirmation of the event 18/11/2020
Report date 20/11/2020
Date submitted to OIE 20/11/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 20/06/2020
Manifestation of disease Sub-clinical infection
Causal agent Low pathogenic avian influenza virus
Serotype H5
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
New outbreaks (1)
Outbreak 1 (LPAI 4_2020_PV) Gallivola, PAVIA, Lombardia
Date of start of the outbreak 17/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 11214 8
Affected population The positivity concerns a breeding of Gallus gallus and ducks located in the municipality of Galliavola, in the province of Pavia.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 11214 8
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 0.07% ** ** **
*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 The positivity concerns a breeding of Gallus gallus and ducks located in the municipality of Galliavola, in the province of Pavia. So far, positivity has only been confirmed on a serological basis by H5 subtype specific haemagglutination inhibition tests. No clinical signs or increased mortality were reported in this flock. Further investigations and sampling are underway to detect the active circulation of the virus and to identify and characterize the strain responsible for seroconversion. Based on the absence of clinical signs, it is believed that seropositivity can be attributed to an LPAI infection.
Control measures
Measures applied
Surveillance within containment and/or protection zone
Traceability
Official disposal of carcasses, by-products and waste
Stamping out
Disinfection
Vaccination permitted (if a vaccine exists)
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 (IZS), Venezie - Padova (National laboratory) Birds haemagglutination inhibition test (HIT) 18/11/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.