On 29 October, 2026, the U.S. Department of Agriculture (USDA) Animal and Plant Health Inspection Service (APHIS) has confirmed the detection of highly pathogenic avian influenza (HPAI) in WOAH Non-Poultry in Sacramnto(30 birds affected) county, California.

On 28 October, 2026, the U.S. Department of Agriculture (USDA) Animal and Plant Health Inspection Service (APHIS) has confirmed the detection of highly pathogenic avian influenza (HPAI) in Commercial Table Egg Layer in Stanislaus(1309100 birds affected) county, California.

From 22 October, 2026 to 27 October, 2026, APHIS reported 13 wild birds collected from 17 October to 19 October in 2026 (California gull, Mallard(3), Gadwall(2), Green-winged teal, American wigeon(2), Ring-necked duck(3), Northern shoveler) tested positive for EA H5 HPAI strain in (Siskiyou(12), San Diego) counties, California.

Submitting Agency: CA DFW(California Department of Fish and Wildlife)/CAHFS, NWDP(USDA Wildlife Services National Wildlife Disease Program)