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. 2023 Jan;33(1):29-35.
doi: 10.1007/s00590-021-03156-0. Epub 2021 Oct 27.

Empiric antibiotic therapy in early periprosthetic joint infection: a retrospective cohort study

Ruben Scholten  1 , Peter M C Klein Klouwenberg  2 , Jet E H Gisolf  3 , Job L C van Susante  1 , Matthijs P Somford  4
Affiliations

Empiric antibiotic therapy in early periprosthetic joint infection: a retrospective cohort study

Ruben Scholten et al. Eur J Orthop Surg Traumatol. 2023 Jan.

Abstract

Purpose: Periprosthetic joint infection (PJI) is a devastating complication following total knee or total hip arthroplasty (TKA/THA). Appropriate empiric antibiotic treatment, initiated directly after debridement and implant retention (DAIR), is suggested to contribute to treatment success. The aim of this study was to describe the microbiology and the antibiotic susceptibility in early PJI to guide future empiric treatment in a region with a low incidence of methicillin-resistant Staphylococcus aureus (MRSA).

Methods: Consecutive patients who underwent DAIR within 3 months after primary unilateral TKA or THA between January 2011 and December 2018 were retrospectively identified from the hospital electronic health records. Data on causative pathogens, antimicrobial susceptibility and the number of post-operative days until cultures demonstrated bacterial growth were collected.

Results: One hundred and eleven early PJIs were identified of which 65 (59%) were monomicrobial and 46 (41%) polymicrobial. Among all isolated pathogens, Staphylococcus aureus (n = 53; 29%) was the most commonly identified pathogen in early PJI without any involvement of MRSA. 72% of PJIs were susceptible to vancomycin which could be increased to around 90% by adding gram-negative coverage. On the 5th postoperative day, bacterial growth was observed in 98% of cases. All gram-negative bacteria demonstrated positive tissue cultures on the 4th postoperative day.

Conclusion: Vancomycin combined with ciprofloxacin or a third generation cephalosporin provided the highest antimicrobial coverage of all responsible pathogens identified in early PJI. Empiric treatment of gram-negative treatment can be safely terminated in the absence of gram-negative pathogens after 4 days of culturing in cases without preoperative antibiotic treatment.

Keywords: Antibiotics; Arthroplasty; Infection; Periprosthetic Joint Infection; Total Hip Arthroplasty; Total Knee Arthroplasty.

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