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Individualized antibiotic prophylaxis reduces surgical site infections by gram-negative bacteria in instrumented

Susana Núñez-Pereira1, F Pellisé, D Rodríguez-Pardo

  • 1German Scoliosis Center Bad Wildungen, Im Kreuzfeld 4, 34537, Bad Wildungen, Germany. snunezpereira@gmail.com

European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
|July 27, 2011
PubMed
Abstract

Insights

Individualized antibiotic prophylaxis targeting gram-negative bacteria (GNB) significantly reduced surgical site infections (SSI) after spinal fusion. Preoperative screening and treatment for GNB colonization proved effective in preventing these challenging infections.

Area of Science:

  • Infectious Disease
  • Orthopedic Surgery
  • Bacteriology

Background:

  • Surgical site infection (SSI) is a significant complication following posterior spinal fusion and instrumentation (PSFI).
  • An increasing incidence of SSI caused by gram-negative bacteria (GNB) has been noted.
  • Current antibiotic prophylaxis guidelines are insufficient for preventing GNB-related SSIs.

Purpose of the Study:

  • To evaluate the effectiveness of individualized antibiotic prophylaxis based on preoperative urine cultures for preventing GNB SSIs after PSFI.
  • To compare SSI rates and causative organisms between standard and individualized prophylaxis protocols.

Main Methods:

  • Retrospective cohort study comparing two groups of patients undergoing PSFI.
  • Cohort A received standard cefazolin prophylaxis.
  • Cohort B received individualized prophylaxis based on preoperative urine culture screening for patients with urinary tract colonization risk factors.

Main Results:

  • Cohort A had a 9.3% SSI rate, with 68.2% caused by GNB.
  • In Cohort B, 17% were at risk for GNB colonization, and 36% of these had positive urine cultures.
  • Cohort B showed a statistically significant reduction in GNB SSIs (6.27% overall SSI rate, 33.4% GNB contribution).

Conclusions:

  • Patients with neurogenic bladder or indwelling catheters exhibit higher preoperative GNB colonization rates.
  • Preoperative bacteriological screening and targeted antibiotic treatment effectively reduce GNB SSIs.
  • Individualized antibiotic prophylaxis is a successful strategy for mitigating GNB SSI after PSFI.

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