Archive Case #75: Bovine Blackleg

Clinical Clues

1. A rapidly growing young beef animal is found acutely lame and depressed on pasture.
2. A hot painful swelling is present high in the hindlimb musculature.
3. The tissue becomes crepitant as the case progresses.
4. Fever and rapid deterioration are noted despite no obvious penetrating injury.
5. The pattern is consistent with clostridial myositis in an unprotected animal.
6. Blackleg is a peracute bacterial muscle disease of young cattle that often leads to sudden death.

Diagnosis

Bovine Blackleg

This case is most consistent with Bovine Blackleg because the calf has acute painful muscle swelling with gas formation and rapid systemic decline. The most important clues are the crepitus and young grazing animal signalment, which strongly support clostridial myositis.

Educational Use

Vetdle archive cases are educational veterinary games for diagnostic reasoning practice. They do not provide veterinary advice, diagnosis, treatment, or professional medical guidance.