Problems in diagnosis and therapy of Mycobacterium fortuitum infections.

Mycobacterium fortuitum was isolated 11 times from 8 patients during a 6-year period. Six of the isolates were from sputum; one was from aspiration of a lymph node, and 4 were from wound cultures. The isolation from sputum was believed not to be associated with pulmonary infection in all 6 instances. The difficulty in diagnosis and therapy of infections with Mycobacterium fortuitum is illustrated by these cases and by others from the literature. Amikacin and doxycycline may offer some therapeutic benefit for patients with Mycobacterium fortuitum infections.