SEVPAC 2025

Contributor:SEVPAC

Signalment:43-week-old broiler breeder chickens

History:In one day, high, sudden mortality of approximately 10% of one house occurred on a two-house, 20,000-bird farm. Symptomatic birds were lethargic

to moribund, with labored breathing and loose, yellow droppings. Some birds trembled if gently nudged.