Left Displaced Abomasum (LDA)

GastrointestinalBovineNew

Key Points

Left displaced abomasum (LDA) is a condition that occurs when a gas-filled, motile abomasum becomes trapped between the rumen and left body wall
Most commonly occurs in high-producing dairy cows in the first month post-calving
- Abomasal hypomotility, gas accumulation, ↓ rumen fill and ↑ abdominal space after calving all permit abomasal movement
Key clinical signs include a drop in milk yield, reduced appetite and left-sided ‘ping’ on auscultation and percussion of the left abdominal wall
Diagnosis is primarily based on signalment, history and clinical exam
Surgical correction with fixation is the treatment of choice
Prevention relies on good transition cow management, optimising nutrition, maximising rumen fill and reducing periparturient disease

Differential Diagnoses

Free gas bloat
Right displaced abomasum (RDA) and volvulus
Vagal indigestion
Caecal dilatation and volvulus

Educational content only. This factsheet is for general veterinary education and is not a substitute for professional veterinary advice, diagnosis, or treatment. Not for use in an emergency — contact a veterinarian or emergency service. Full disclaimer →