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Case Reports in Infectious Diseases
Volume 2018, Article ID 3297531, 3 pages
Case Report

Chronic Tenosynovitis due to Mycobacteria kansasii in an Immunocompetent Host

1Department of Medicine, Lakeland Health, St. Joseph, MI, USA
2Osteopathic Medical Specialties, College of Osteopathic Medicine, Michigan State University, Lansing, MI, USA
3Department of Surgery, Lakeland Health, St. Joseph, MI, USA
4Infection Prevention, Lakeland Health, St. Joseph, MI, USA
5Department of Pathology, Lakeland Health, St. Joseph, MI, USA

Correspondence should be addressed to Michael S. Wang; gro.cmws@gnawm

Received 25 January 2018; Accepted 29 March 2018; Published 16 April 2018

Academic Editor: Larry M. Bush

Copyright © 2018 Michael S. Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We report a case of a healthy 56-year-old male who presented with chronic swelling and erythema in his right hand. He had a prior chemical exposure several years ago and subsequent exposure to freshwater, fish tank, and soil. Laboratory data showed a slightly elevated CRP. An MRI was consistent with suggestive of flexor tenosynovitis. He underwent surgical debridement and was diagnosed with Mycobacterium kansasii. He was treated with clarithromycin, rifampin, and isoniazid, but subsequent susceptibility testing revealed resistance to isoniazid. Isoniazid was switched to ethambutol, but further susceptibility testing also suggested resistance to ethambutol. Antimicrobial therapy was stopped at 6 months due to clinical recovery, and the patient is currently doing well as of 6 months postdiscontinuation of therapy.