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Oyster-related tenosynovitis: a rare case of Mycobacterium szulgai in the immunocompromised
  1. Michael Howard Baca-Atlas,
  2. Amir Homayoun Barzin
  1. Department of Family Medicine, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, USA
  1. Correspondence to Dr Amir Homayoun Barzin, amir_barzin{at}


A 66-year-old man with a history of renal transplant on chronic immunosuppression presented to his primary care physician with a swollen right index finger. On examination, mild swelling was present. Conservative management failed and initial plain films were negative. Corticosteroid injection was performed by orthopaedics, but symptoms recurred several months later and an MRI showed flexor digitorum tenosynovitis and abscesses of the superficialis and profundus tendons. A flexor tenolysis was performed with cultures positive for Mycobacterium szulgai, a rare, non-tuberculous mycobacterial infection. Treatment was initiated with moxifloxacin, ethambutol and azithromycin daily for nearly 4 months. Repeat MRI 3 months after completion of antibiotics showed near resolution of the tenosynovitis.

  • musculoskeletal and joint disorders
  • general practice / family medicine
  • bone And joint infections
  • renal transplantation
  • orthopaedics

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  • Contributors MHB-A contributed to drafting and revising significant portions of the content and research. AHB provided drafting and final approval of the version published.

  • Competing interests None declared.

  • Patient consent Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.