Working Animals

Horse Pigeon Fever: Corynebacterium pseudotuberculosis

Pigeon fever is a bacterial infection in horses causing characteristic chest abscesses and significant welfare impacts.

Key Facts

Named for the chest swelling that resembles a pigeon breast
Spread by flies and contaminated soil in dry western US states
Internal abscesses cause more severe illness and higher mortality
Abscesses may require weeks to mature before surgical drainage
Recurrence in subsequent years is possible in endemic areas

Welfare Considerations

Horses with pigeon fever experience painful, sometimes immobilizing abscesses. Internal forms cause fever, weight loss, and organ damage. The waiting period while abscesses mature is prolonged and uncomfortable. Fly control and good biosecurity reduce the burden of disease.

What You Can Do

Use fly control measures on horses in endemic regions
Keep horses on dry, well-drained ground where possible
Call a vet early when swellings appear - do not lance prematurely
Isolate infected horses to prevent environmental contamination
Report cases to your veterinarian for guidance on drainage and recovery