General information
Report type: immediate notification
Started: 13 Oct 2021
Confirmed: 22 Oct 2021
Reported: 26 Oct 2021
Reason for notification: recurrence
Last occurrence: 14 May 2021
Causal agent: Highly pathogenic avian influenza virus
Serotype: H5N1
Nature of diagnosis: laboratory
This event pertains to the whole country.

Total outbreaks: 2
Outbreak location 1: Vilslev, Esbjerg, Syddanmark
Started: 16 Oct 2021
Ended: 16 Oct 2021
Epidemiological unit: not applicable
Animals affected:
Species / Susceptible / Cases / Deaths / Killed and disposed of /
Slaughtered or killed for commercial use / Vaccinated
Common teal (_Anas crecca_): Anatidae-Anseriformes / - / 1 / 0 / - / 0
/ 0
Affected population: on 16 Oct 2021, a sample from a common teal
(_Anas crecca_) was collected as part of the Danish active
surveillance program for HPAI near Vilslev in the municipality of
Esbjerg. Confirmed infection with highly pathogenic influenza A virus (H5N1) in the sample.

Outbreak location 2: Hojer, Tonder, Syddanmark
Started: 13 Oct 2021
Ended: 13 Oct 2021
Epidemiological unit: not applicable
Animals affected:
Species / Susceptible / Cases / Deaths / Killed and disposed of /
Slaughtered or killed for commercial use / Vaccinated
Eurasian wigeon (_Anas Penelope_): Anatidae-Anseriformes / - / 1 / 0 /
- / 0 / 0
Affected population: on 13 Oct 2021, a pooled sample of bird
droppings from 10 Eurasian wigeons (_Anas Penelope_) was taken as part
of the Danish active surveillance program for HPAI near Hojer in the
municipality of Tonder. On 22 Oct 2021, confirmed infection with highly pathogenic influenza A virus (H5N1) in the pooled sample.

Epidemiology
Source of the outbreak(s) or origin of infection: contact with wild
species.
Epidemiological comments: according to article 10.4.1.4 of the
Terrestrial Animal Health Code, Member Countries should not impose
bans on the trade in poultry commodities in response to notification
on the presence of any influenza A virus in birds other than poultry.

Diagnostic test results
Laboratory name and type / Species / Outbreaks / Test / Test date /
Result
Statens Serum Institut National Laboratory/ Eurasian Wigeon/Common
Teal / 2 / Reverse transcription-polymerase chain reaction (RT-PCR) /
13 to 22 Oct 2021 / positive