Information received on 23/12/2020 from Dr Loic Evain, Directeur Général adjoint, CVO, Direction générale de l´alimentation, Ministère de l´Agriculture et de l´Alimentation, Paris, France
Summary
Report type
Follow-up report No. 6
Date of start of the event
07/11/2020
Date of confirmation of the event
16/11/2020
Report date
22/12/2020
Date submitted to OIE
23/12/2020
Reason for notification
Recurrence of a listed disease
Date of previous occurrence
27/10/2017
Manifestation of disease
Clinical disease
Causal agent
Highly pathogenic avian influenza virus
Serotype
H5N8
Nature of diagnosis
Clinical, Laboratory (advanced)
This event pertains to
a defined zone within the country
Related reports
Immediate notification (16/11/2020)
Follow-up report No. 1 (23/11/2020)
Follow-up report No. 2 (07/12/2020)
Follow-up report No. 3 (10/12/2020)
Follow-up report No. 4 (14/12/2020)
Follow-up report No. 5 (18/12/2020)
Follow-up report No. 6 (22/12/2020)
New outbreaks (3)

Outbreak 1 (IA-2020-0541)
BENESSE-MAREMNE, BENESSE-MAREMNE, Landes
Date of start of the outbreak
14/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Backyard
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
89

1
88
0
Affected population
The backyard is located 100 metres from the first outbreak (IA-2020-0484). The animals showed no clinical signs, only one rooster was found dead. The infection was detected during surveillance of poultry in the protection zone. The animals were euthanised as soon as they were detected by the departmental laboratory and before official confirmation by the national reference laboratory.
Outbreak 2 (IA-2020-0542)
SORT en CHALOSSE, SORT en CHALOSSE, Landes
Date of start of the outbreak
19/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
612
612
5
607
0
Affected population
Fattened ducks, in preparation for force-feeding, showed clinical signs suggestive of avian plague. The departmental laboratory revealed contamination by an HPAI virus. The national reference laboratory confirmed infection with subtype H5N8, clade 2.3.4.4.b. The animals were immediately slaughtered.
Outbreak 3 (IA-2020-0544)
BERGOUEY, BERGOUEY, Landes
Date of start of the outbreak
20/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
6000
1200
2
5998
0
Affected population
A batch of fattened ducks in preparation for force-feeding showed clinical signs suggestive of avian plague. Only one batch from the farm showed symptoms. The national laboratory confirmed infection with HPAI virus H5N8 of clade 2.3.4.4.B. Birds from all batches were euthanised.
Summary of outbreaks
Total outbreaks: 3
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
6701
1812 **
8
6693
0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Birds
**
0.12%
**
100.00%
*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
Fomites (humans, vehicles, feed, etc.)
Contact with wild species

Control measures
Measures applied
Movement control inside the country
Surveillance within containment and/or protection zone
Traceability
Stamping out
Zoning
Disinfection
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
Ploufragan-Plouzané-Niort Laboratory, Ploufragan site, ANSES (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
16/12/2020
Positive
Ploufragan-Plouzané-Niort Laboratory, Ploufragan site, ANSES (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
20/12/2020
Positive
Ploufragan-Plouzané-Niort Laboratory, Ploufragan site, ANSES (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
21/12/2020
Positive
Ploufragan-Plouzané-Niort Laboratory, Ploufragan site, ANSES (National laboratory)
Birds
virus sequencing
18/12/2020
Positive
Ploufragan-Plouzané-Niort Laboratory, Ploufragan site, ANSES (National laboratory)
Birds
virus sequencing
21/12/2020
Positive
Ploufragan-Plouzané-Niort Laboratory, Ploufragan site, ANSES (National laboratory)
Birds
virus sequencing
22/12/2020
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.