Granulomatous lesions in pigs associated with the use of an oil-based erysipelas vaccine.

Severe granulomatous lesions in cervical muscles and lymph nodes, associated with the use of an oil-based erysipelas vaccine, caused considerable economic loss at slaughter in 1400 pigs from the one herd. The condition was reproduced experimentally using the same vaccine, and in a less severe form with another commercially available oil-based erysipelas vaccine.