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Lumpy Jaw (Actinomycosis) in Cattle: Welfare and Treatment

Lumpy jaw is a bacterial bone infection causing progressive mandibular swelling in cattle. This guide covers welfare impacts and treatment.

Key Facts

Lumpy jaw is caused by Actinomyces bovis bacteria entering through mouth wounds
The bacteria infect the mandible (lower jaw) causing progressive bone destruction
Affected cattle develop hard, painless then painful swellings of the jaw
Difficulty eating causes progressive weight loss and welfare compromise
Sodium iodide treatment may help early cases; advanced disease has poor prognosis
Welfare assessment must consider the animal's ability to eat and maintain condition

Welfare Considerations and Management

Treatment of lumpy jaw is most successful in early cases. Sodium iodide given intravenously or orally as potassium iodide may arrest progression. Penicillin has some effect. Surgical drainage of associated abscesses provides temporary relief. Advanced cases with severe bone destruction rarely respond to treatment and warrant welfare-based culling decisions. Prevention involves minimising mouth trauma from rough feed and sharp objects.

What You Can Do

Seek veterinary treatment early for any cattle with jaw swellings
Assess quality of life regularly — advanced cases may require humane culling
Avoid sharp or coarse feeds that could cause mouth injuries
Isolate and investigate affected animals to rule out other conditions