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USDA's APHIS reported that whole-genome sequencing confirmed the H5N1 genotype B3.13 in two Washington dairy herds first announced on October 8, 2026. The sequencing is consistent with virus spread from Idaho, most likely through cattle movement.
Surveillance around the affected premises and across Washington is ongoing.
Dairy herd infections can reduce milk output and tighten surveillance on cattle movements, which feeds into dairy and feed-ingredient demand. The detection is confined so far, so the price effect should be limited.
aphis-prod.azureedge.usNov 4, 2026After 22 past neutral disease events, Milk (Class III) moved a median -0.1% over 5 sessions (41% higher; middle half -1.4% to +0.5%), and +0.2% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.
