The pathogenic effects of Mycobacterium haemophilum in immunosuppressed albino mice

Of 30 prednisolone-treated mice challenged intravenously with Mycobacterium haemophilum, 12 developed skin lesions, primarily on the ears, from which the mycobacterium was isolated. These lesions were not observed in mice challenged with M. haemophilum but not given prednisolone. M. haemophilum infection prolonged the life and reduced the frequency of intercurrent infection with Corynebacterium murium in prednisolone-treated mice.