# Update: Genetic Sequencing Results for Washington Dairy Herd Detection of Highly Pathogenic Avian Influenza

> 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.

- Date: 2026-11-04 · published 2026-11-05T00:14:06.986Z
- Category: disease · region US · magnitude low
- Page: https://feedsoft.ai/events/80760-update-genetic-sequencing-results-for-washington-dairy-herd-detection-of-highly
- Commodities: [Milk (Class III)](https://feedsoft.ai/c/MILK.md)

## Why it matters

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.

## Read by commodity

- MILK: neutral

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| MILK | 2025-12-19 | [Update: Genetic Sequencing Results for Wisconsin Dairy Herd Detection of Highly Pathogenic Avian Influenza \| APHIS](https://feedsoft.ai/events/15946-update-genetic-sequencing-results-for-wisconsin-dairy-herd-detection-of-highly.md) | +0.4% | -6.6% |
| MILK | 2024-04-28 | [Influenza A (H5N1) of avian origin in domestic livestock in the USA - GOV.UK](https://feedsoft.ai/events/16098-influenza-a-h5n1-of-avian-origin-in-domestic-livestock-in-the-usa-gov-uk.md) | +18.6% | +19.7% |
| MILK | 2024-10-30 | [Protect Livestock and Public Health from H5N1 Avian Influenza \| APHIS](https://feedsoft.ai/events/16051-protect-livestock-and-public-health-from-h5n1-avian-influenza-aphis.md) | -12.3% | -12.6% |
| MILK | 2026-03-20 | [Why We Must Vaccinate US Dairy Cattle Against HPAI H5N1 \| The Journal of Infectious Diseases \| Oxford Academic](https://feedsoft.ai/events/15928-why-we-must-vaccinate-us-dairy-cattle-against-hpai-h5n1-the-journal-of.md) | +0.1% | +4.5% |
| MILK | 2024-04-03 | [Bird flu hits Texas dairy cows, hens, human as ducks migrate](https://feedsoft.ai/events/16103-bird-flu-hits-texas-dairy-cows-hens-human-as-ducks-migrate.md) | -4.7% | -5.0% |

## Sources

- aphis-prod.azureedge.us: https://aphis-prod.azureedge.us/news/agency-announcements/update-genetic-sequencing-results-washington-dairy-herd-detection-highly

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Data from Feedsoft AI (https://feedsoft.ai/). For information only; not investment advice.