Mycobacterial Skin Infection by an Unidentified Species

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Abstract
Twenty-nine patients from a geographically limited area, predominantly in Minnesota and Southern Manitoba, had myobacterial skin infection. Acid-fast bacilli were found in biopsy specimens of the lesions but could not be cultured. The patients presented most frequently in winter months and most often had lymph node swelling and an associated positive tuberculin test. They responded to local excision or antituberculous therapy, or both. It is suggested that these patients had primary skin infections, with a single species of mycobacterium, and they represent a previously undescribed clinical problem.

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