A Rare Catch in a Nonhealing Wound

Tanushree Agrawal, MD; Stephanie Fuentes Rojas, MD; Rosalyn Adigun, MD; Manjulatha Badam, MD, CWS

Disclosures

Wounds. 2018;30(9):E87-E88. 

In This Article

Abstract and Introduction

Abstract

Introduction: Mycobacterium smegmatis is a common microbe found in soil, dust, and water that rarely causes infections in humans.

Case Report: A 45-year-old man with a past medical history of hypertension presented with a nonhealing surgical wound in his anterior chest wall, measuring 0.5 cm x 0.5 cm x 0.3 cm with minimal serosanguinous drainage, that had been present for more than 1 year. Wound swab showed M smegmatis. He required a 3-month course of antibiotic treatment and advanced wound care that included packing the sinus wounds with silver-alginate dressings for the first 2 weeks followed by iodoform packing; once the infection and drainage had improved after 2 months of treatment, packing was changed to a collagen dressing. He responded well to treatment, and the ulcers completely closed at the end of his 3-month course.

Conclusions: This case illustrates the importance of considering atypical microbial infections in the workup for chronic nonhealing wounds.

Introduction

Mycobacterium smegmatis is a common microbe found in soil, dust, and water that rarely causes infections in humans. Most reported cases of M smegmatis infections are associated with direct inoculation of contaminants into soft tissues.[1] Herein, the authors report a case of M smegmatis infection in a nonhealing chest wound.

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