Introduction

A fungal infection, Trichophyton gallinae, of chickens and turkeys. It is very rare in commercial poultry production.

Signs

• White, powdery spots and wrinkled crusts and scab on comb and wattles.
• Feather loss.
• 'Honeycomb' skin.
• Thick crusty skin.
• Loss of condition.

Post-mortem lesions

• See signs (above).

Diagnosis

Lesions, isolation.

Treatment

Formalin in petroleum jelly.

Prevention

Good hygiene of facilities, culling affected birds.