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Updated: Jun 22, 2026

Intradermal Inoculation of Mycobacterium avium in the Mouse Ear
Published on: July 3, 2025
Mesotherapy and cutaneous Mycobacterium fortuitum infection
Elisa Margherita Difonzo1, Grazia Lucia Campanile, Laura Vanzi
1Department of Dermatology, University of Florence, Italy. elisa.difonzo@asf.toscana.it
Background:
Cutaneous infections caused by Mycobacterium fortuitum usually are a complication of trauma or postsurgical wounds.
Case Report:
A 41-year-old woman presented with numerous dusky red nodules, abscesses and sinuses on the right buttock and on the lateral surfaces of both thighs. The lesions developed at the injection sites of mesotherapy treatment. M. fortuitum was cultured from a biopsy specimen and purulent fluid drained from lesions. The lesions had cleared completely with ciprofloxacin 500 mg b.d. for 3 weeks, and then 250 mg b.d. for another 3 weeks.
Conclusions:
This case demonstrates the importance of suspecting mycobacterial etiology in patients with nodules and abscesses in the areas of mesotherapy treatment.
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