Introduction

A nematode worm parasite, Amidostomum anseris, affecting geese and ducks. Worms develop to L3 in eggs and infection is by the oral route direct from environment.

Signs

• Depression.
• Loss in condition and weight.
• Slow growth.

Post-mortem lesions

• Ulceration, necrosis and partial sloughing of gizzard lining, muscular wall may be sacculated or ruptured.
• Adults are 2-4 cm long and usually bright red.

Diagnosis

Lesions, visualisation of worms.

Treatment

Levamisole, benzimidazoles.

Prevention

Rotation of ground on annual basis.