Summary
Report type: Immediate notification
Date of start of the event: 10 Jan 2021
Date of confirmation of the event: 13 Jan 2021
Reason for notification: Recurrence of a listed disease
Date of previous occurrence: 14 Jan 2021
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.

New outbreaks (1)
Summary of outbreaks:
Total outbreaks: 1
Outbreak location: Minxiong Township, Chiayi County, Taiwan
Date of start of the outbreak: 11 Jan 2021
Outbreak status: on going
Epidemiological unit: farm
Affected animals:
Species / Susceptible / Cases / Deaths / Killed and disposed of /
Slaughtered-Killed for commercial use / Vaccinated
Black Swan (_Cygnus atratus_): Anatidae-Anseriformes / - / 9 / 9 / 4 /
0 / 0
Affected population: Dead _Cygnus atratus_ were found at National
Chung Cheng University and were reported to the Local Animal Disease
Inspection Authority (LADIA) on [11 Jan 2021].

Epidemiology
Source of the outbreak(s) or origin of infection: Unknown or
inconclusive

Epidemiological comments: The dead _Cygnus atratus_ were sampled by
LADIA. These samples were inspected and confirmed by Animal Health
Research Institute (AHRI). Highly pathogenic avian influenza H5N5
subtype was confirmed on [14 Jan 2021]. On the site where the _Cygnus
atratus_ were found has been set a warning sign to alert people.
Thorough cleaning and disinfection have been conducted after stamping
out operation. No poultry farms are within 1 km [approx. 0.6 mi]
radius of this infected region. Surrounding poultry farms within 3 km
[approx. 1.8 mi] radius of the infected region are under intensified
surveillance twice in 3 months.

Control measures applied: zoning, surveillance outside containment and
or the protection zone, surveillance within containment and or the
protection zone, stamping out, disinfection

Diagnostic test results
Laboratory name and type: Animal Health Research Institute (AHRI)
(National Laboratory)
Species / Test / Test date / Result
Black Swan / Reverse transcription-polymerase chain reaction (RT-PCR)/
13 Mar 2021 / Positive
Black Swan / Genotyping / 14 Mar 2021 / Positive

Future reporting
The event is continuing. Weekly follow-up reports will be submitted.