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Positive Culture of Atypical Mycobacterium Avium Following Revision Total Knee Arthroplasty
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Positive Culture of Atypical Mycobacterium Avium Following Revision Total Knee Arthroplasty
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Journal Article
Positive Culture of Atypical Mycobacterium Avium Following Revision Total Knee Arthroplasty
2024
Overview
CASE: We report a rare case of mycobacterial periprosthetic joint infection (PJI) after primary total knee arthroplasty 14 years earlier. Progressive knee pain over three years with a negative PJI infectious workup led to revision total knee arthroplasty. A surprising result was isolation of Mycobacterium avium from tissue cultures taken at time of revision surgery. After six months of antibiotic treatment, the patient is alive with wellfunctioning pain-free TKA at over one-year follow-up. CONCLUSION: Periprosthetic joint infection can present acutely or chronically years following total knee arthroplasty. Depending on the infecting organism, patients can present with sepsis, or a more indolent slower course that mimics aseptic loosening. In the absence of positive pre-operative labs and cultures, and based on the Musculoskeletal Infection Society (MSIS) criteria, aseptic loosening is a diagnosis of exclusion. An atypical infectious organism should be considered a possible cause and may require specialized cultures of operative specimens.
