Tuesday, May 20, 2025

Chicken spotty liver disease – a potential vaccine on the horizon

By Dr. Denise Heard U.S. Poultry & Egg Association

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TUCKER, Ga. — Spotty Liver Disease (SLD) manifests as acute infectious hepatitis in layer chickens. The disease occurs mostly in barn housed or free-range layer flocks and is characterized by an acute drop in egg production and high mortality.

With the production practice changes in the egg industry from conventional cages to cage-free housing systems, the incidence and economic impact of SLD is expected to become more prominent. Due to the great economic losses incurred by SLD, it has become an important concern for the egg industry.

Recently, Campylobacter hepaticus was identified as the causative agent for chicken SLD. . .

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