Overview
- DATCP confirmed highly pathogenic avian influenza in two commercial poultry flocks in Jefferson and Walworth counties.
- About 1,621,847 birds in Jefferson County and 1,493,596 in Walworth County are slated for depopulation to halt spread.
- Quarantines are in place with 10‑kilometer control areas and movement restrictions, affected birds will not enter the food supply, and exposed workers are being monitored.
- The detections represent the second Jefferson County commercial farm hit this year and the fourth Wisconsin case in just over a week after a late‑February Jefferson outbreak and a recent Dane County backyard case.
- Officials report low risk to the general public, urge strict biosecurity steps, and face local calls for more resources and groundwater safeguards due to strains from large‑scale disposal operations.