US - 1 new outbreak of highly pathogenic avian influenza H5N4 on a backyard producer premises in Teton County, Montana (WOAH, October 20, 2022)

[Pathfinder]

United States of America - High pathogenicity avian influenza viruses (poultry) (Inf. with) - Immediate notification

GENERAL INFORMATION
COUNTRY/TERRITORY OR ZONE
ZONE

ANIMAL TYPE
TERRESTRIAL

DISEASE CATEGORY
OIE-listed

EVENT ID
4655

DISEASE
High pathogenicity avian influenza viruses (poultry) (Inf. with)

CAUSAL AGENT
Highly pathogenic avian influenza virus

GENOTYPE / SEROTYPE / SUBTYPE
H5N4

START DATE
2022/09/10

REASON FOR NOTIFICATION
New strain in the country

DATE OF LAST OCCURRENCE
-

CONFIRMATION DATE
2022/09/15

EVENT STATUS
On-going

END DATE
-

SELF-DECLARATION
NO

REPORT INFORMATION
REPORT NUMBER
Immediate notification

REPORT ID
IN_157497

REPORT REFERENCE
-

REPORT DATE
2022/10/20

REPORT STATUS
Validated

NO EVOLUTION REPORT
-

EPIDEMIOLOGY
SOURCE OF EVENT OR ORIGIN OF INFECTION
Unknown or inconclusive

EPIDEMIOLOGICAL COMMENTS
Highly pathogenic avian influenza (HPAI) H5N4, Eurasian lineage goose/Guangdong clade 2.3.4.4b was confirmed on a backyard producer premises in Teton County, Montana. This lineage is highly pathogenic for poultry and is a reassortant of the initial Newfoundland-like virus introduced December 2021 with North American wild bird lineage segments PB2, PB1, NP, and NA. This is the first confirmed case of HPAI H5N4 in poultry in the United States. NOTE: this outbreak was first reported on follow-up report 31 for the ongoing H5N1 Event 4309 in the United States; the N-type was characterized on 10/17/2022.
...
NEW OUTBREAKS
OB_107883 - TETON COUNTY
OUTBREAK REFERENCE
Teton 01

START DATE
2022/09/10

END DATE
-

DETAILED CHARACTERISATION
-

FIRST ADMINISTRATIVE DIVISION
Montana

SECOND ADMINISTRATIVE DIVISION
Teton

THIRD ADMINISTRATIVE DIVISION
-

EPIDEMIOLOGICAL UNIT
Backyard

LOCATION
Teton County

Latitude, Longitude
47.803 , -112.188

(Approximate location)
OUTBREAKS IN CLUSTER
-

MEASURING UNIT
Animal

AFFECTED POPULATION DESCRIPTION
A backyard producer promises. Clinical signs included lethargy, depression and death. State officials have quarantined the affected promises. Depopulation was completed on 16 Sep 2022. Disposal was completed on 16 Sep 2022. Cleaning was completed on 19 Sop 2022. Disinfection was completed on 19 Sep 2022.

SpeciesSusceptibleCasesDeathsKilled and Disposed ofSlaughtered/ Killed for commercial useVaccinated
Birds (DOMESTIC)
NEW 2610--2610--
TOTAL2610--2610--


...
https://wahis.woah.org/#/in-review/4655

 

[Mary Wilson]

United States of America - High pathogenicity avian influenza viruses (poultry) (Inf. with) - Immediate notification: H5N4 - WAHIS

World Organisation for Animal Health
Founded as OIE


... SOURCE OF EVENT OR ORIGIN OF INFECTION

• Unknown or inconclusive

EPIDEMIOLOGICAL COMMENTS

Highly pathogenic avian influenza (HPAI) H5N4, Eurasian lineage goose/Guangdong clade 2.3.4.4b was confirmed on a backyard producer premises in Teton County, Montana. This lineage is highly pathogenic for poultry and is a reassortant of the initial Newfoundland-like virus introduced December 2021 with North American wild bird lineage segments PB2, PB1, NP, and NA. This is the first confirmed case of HPAI H5N4 in poultry in the United States. NOTE: this outbreak was first reported on follow-up report 31 for the ongoing H5N1 Event 4309 in the United States; the N-type was characterized on 10/17/2022.

https://wahis.woah.org/#/in-review/4655