Abstract: Iatrogenic Mycobacterium fortuitum infection is mostly related to surgical wounds, organ transplantation, dialysis, and injection. We report a case of Mycobacterium fortuitum infection after injection, which was misdiagnosed as soft tissue infections and pyoderma gangrenosum. The disease was confirmed by pathology, culture, and PCR sequencing, and the isolated strain was tested for susceptibility in vitro. The patient recovered after being treated with imipenem cilastatin sodium, amikacin, ciprofloxacin and other drugs, and after 5 years followed-up, no adverse reactions occurred.

Key words: Mycobacterium fortuitum, skin infections, NTM