Information received on 29/01/2021 from Dr Herman Claeys, Chef du Service Politique sanitaire : Animaux et Végétaux, Directorat-général Animaux, Végétaux et Alimentation, Service Public Fédéral Santé publique, sécurité de la cha?ne alimentaire et environnement, Bruxelles, Belgium
Summary
Report type
Follow-up report No. 1
Date of start of the event
18/11/2020
Date of confirmation of the event
25/11/2020
Report date
29/01/2021
Date submitted to OIE
29/01/2021
Reason for notification
Recurrence of a listed disease
Date of previous occurrence
21/06/2017
Manifestation of disease
Clinical disease
Causal agent
Highly pathogenic avian influenza virus
Serotype
H5N5
Nature of diagnosis
Laboratory (advanced)
This event pertains to
a defined zone within the country
Related reports
Immediate notification (27/11/2020)
Follow-up report No. 1 (29/01/2021)
New outbreaks (1)

Outbreak 1
Deerlijk, West-Vlaanderen
Date of start of the outbreak
26/01/2021
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
27230

1030
26200

Affected population
Turkeys
Summary of outbreaks
Total outbreaks: 1
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
27230
**
1030
26200

Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Birds
**
3.78%
**
**
*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 turkeys had clinical symptoms and there was some mortality. However they did not have the typical symptoms of bird flu. Histomoniasis (blackhead) was also confirmed.

Control measures
Measures applied
Surveillance outside containment and/or protection zone
Surveillance within containment and/or protection zone
Traceability
Official destruction of animal products
Official disposal of carcasses, by-products and waste
Stamping out
Zoning
Vaccination prohibited
No treatment of affected animals
Measures to be applied
Disinfection
Diagnostic test results
Laboratory name and type
Species
Test
Test date
Result
Sciensano (National laboratory)
Birds
nucleotide sequencing
29/01/2021
Positive
Sciensano (National laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
26/01/2021
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.