Asymptomatic Bacteriuria and Periprosthetic Joint Infection Risk: A Systematic Review and Meta-Analysis.
Vincent Roy, Abigail Van Brenk, Lee R Benaroch et al.
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In 30 seconds
This systematic review and meta-analysis examined whether asymptomatic bacteriuria (ASB) is associated with periprosthetic joint infection (PJI) after hip or knee arthroplasty. It included 16 studies: 14 cohorts covering 48,562 joints and two randomized trials covering 1,065 joints. Pooled analysis found higher odds of PJI in patients with ASB (odds ratio 2.41, 95% confidence interval 1.20 to 4.83; P = 0.02). However, analyses by procedure and follow-up did not show a significant association, and antibiotic treatment was not protective.
Key findings
- Across pooled, undifferentiated arthroplasty data, ASB was associated with higher odds of PJI (odds ratio 2.41, 95% confidence interval 1.20 to 4.83; P = 0.02).
- Subgroup analyses by follow-up and procedure type did not show a significant association between ASB and PJI.
- Antibiotic treatment of ASB offered no benefit in elective arthroplasty; ASB was not associated with increased risk in hip fracture hemiarthroplasty, with or without antibiotics.
Why it matters
The pooled association may raise concern about ASB in arthroplasty patients, but the absence of a consistent signal in procedure- and time-specific analyses limits its clinical interpretation. The lack of apparent antibiotic protection is also relevant to avoiding antimicrobial use without demonstrated benefit. Together, these findings frame ASB as an uncertain risk marker rather than an established cause of PJI.
What to keep in mind
Procedure- and time-specific analyses were underpowered, and the significant association was limited to pooled, undifferentiated arthroplasty data.