Summary
Report type: immediate notification
Started: 2 Oct 2022
Confirmed: 18 Oct 2022
Reported: 21 Oct 2022
Reason for notification: 1st occurrence in the country
Causal agent: highly pathogenic avian influenza virus
Serotype: H5N1
Nature of diagnosis: clinical, laboratory
This event pertains to a defined zone within the country.

Outbreak location 1: Predio Los Dos Hermanos, Acandí, Choco
Started: 4 Oct 2022
Detailed characterization: clade: 2.3.4.4b - lineage: reassortment
Eurasian and North American
Epidemiological unit: farm
Animals affected:
Species / Susceptible / Cases / Deaths / Killed and disposed of /
Slaughtered or killed for commercial use / Vaccinated
Birds (domestic) / 57 / 20 / 6 / 51 / 0 / 0
Blue winged teal (wild) / 2 / 0 / 0 / 2 / 0 / 0

Affected population: the affected population includes non-poultry
domestic birds living together with wild birds. Clinical signs were
neurological, respiratory, and digestive signs. The premises does not
have biosecurity measures in place.

Outbreak location 2: Predio Hermanos Diaz, Acandí, Choco
Started: 2 Oct 2022
Detailed characterization: clade: 2.3.4.4b - lineage: reassortment
Eurasian and North American
Epidemiological unit: farm
Animals affected:
Species / Susceptible / Cases / Deaths / Killed and disposed of /
Slaughtered or killed for commercial use / Vaccinated
Birds (domestic) / 137 / 116 / 80 / 57 / 0 / 0
Blue winged teal (wild) / 3 / 0 / 0 / 3 / 0 / 0

Affected population: the affected population includes non-poultry
domestic birds living together with wild birds. Clinical signs were
neurological, respiratory, and digestive signs. The premises does not
have biosecurity measures in place.

Epidemiology
Source of the outbreak(s) or origin of infection: contact with wild
species
Epidemiological comments: after the outbreaks were detected,
epidemiological surveillance and control activities were launched.
Perifocal, surveillance, and protection zones were established. In the
3 zones, a census of the entire avian population, individual clinical
inspection and sampling for active surveillance began in 100% of the
farms in order to assess the disease spread. It is currently
established that the likely origin of the infection is the contact of
non-poultry domestic birds with wild birds (family: Anatidae, species:
_Spatula discors_), as well as other migratory and native wild birds
that are being monitored for identification. As a control measure, the
affected premises, and the municipality of Acandí were quarantined to
prevent movement of animals and products to other territories.
Stamping out of affected animals and in-contacts on the premises where
the disease was detected has begun.

Control measures at event level
Domestic control measures applied: surveillance outside the restricted
zone; surveillance within the restricted zone; traceability;
screening; movement control; disinfection; quarantine
Domestic and wild control measures to be applied: stamping out

Diagnostic test results
Laboratory name and type / Species / Outbreaks / Test / First result
date / Last result date / Result
National Veterinary Diagnostic Laboratory (NVDL) / bird / 1 /
real-time polymerase chain reaction (real-time PCR) / 18 Oct 2022 / 18
Oct 2022 / positive