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vol.14 número2Knee pain, swelling and stiffness after total knee replacement: a survey of South African knee surgeonsIsolated loss of flexor pollicis longus function after plating of the radius índice de autoresíndice de assuntospesquisa de artigos
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SA Orthopaedic Journal

versão On-line ISSN 2309-8309
versão impressa ISSN 1681-150X


VENTER, RG; SOLOMON, C  e  BAARTMAN, M. Mycobacterium fortuitum as infectious agent in a septic total knee replacement: Case study and literature review. SA orthop. j. [online]. 2015, vol.14, n.2, pp.52-56. ISSN 2309-8309.

Infection of prosthetic joints with non-tuberculous mycobacteria (NTM) is rare. The rapidly growing mycobacteria (RGM) are a subgroup of NTM. They are not very virulent organisms, found ubiquitously in the environment, and most infections in humans are due to direct inoculation of the organism into a joint or soft tissue. We describe a 70-year-old patient, who developed an infection with Mycobacterium fortuitum after primary knee arthroplasty, one of only a handful described in the literature. Peri-prosthetic infections with RGM are a challenge because there is a lack of data guiding management, and because the diagnosis is often delayed. Routine cultures of joint effusions or tissue are often discarded before the non-tuberculous mycobacteria have a chance to culture (in our case, 14 days). Principles of treatment include: making a diagnosis from tissue culture, staged revision surgery with aggressive surgical debridement of the joint and high dosages antibiotics (for at least six weeks, treating empirically initially until a sensitivity profile for the organism is available). The second stage of the revision should be delayed by 3-6 months. In our case the removed implant was autoclaved and re-implanted loosely with antibiotic-loaded cement as part of the first-stage revision.

Palavras-chave : total knee replacement; peri-prosthetic joint infection; septic arthritis; rapidly growing mycobacteria; non-tuberculous mycobacteria; Mycobacterium fortuitum; Mycobacterium abcessus; Mycobacterium chelonae; Mycobacterium smegmatis; Mycobacterium kansasii; Mycobacterium goodii.

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