Application of an antibiotic spectrum index in the neonatal intensive care unit

Alexandra C Lahart1, Christopher C McPherson1, Jeffrey S Gerber2,3

  • 1Division of Newborn Medicine, Department of Pediatrics, Washington University School of Medicine, St Louis, Missouri.

Insights

Antimicrobial stewardship programs often use days of therapy, which overlooks antibiotic spectrum. This study assessed an antibiotic spectrum index in very-low-birth-weight infants to better evaluate stewardship interventions.

Area of Science:

  • Neonatal Medicine
  • Infectious Diseases
  • Pharmacology

Background:

  • Antimicrobial stewardship programs (ASPs) are crucial for optimizing antibiotic use.
  • Current metrics like days of therapy (DOT) do not reflect the spectrum of antibiotics used.
  • Broader-spectrum antibiotics may be overused, posing risks like resistance.

Purpose of the Study:

  • To evaluate the utility of an antibiotic spectrum index (ASI).
  • To assess ASI's effectiveness in measuring antimicrobial use in very-low-birth-weight (VLBW) infants.
  • To determine ASI's impact on evaluating antimicrobial stewardship interventions.

Main Methods:

  • Applied an antibiotic spectrum index to a cohort of VLBW infants.
  • Calculated ASI based on prescribed antimicrobial agents.
  • Compared ASI with traditional metrics like DOT.

Main Results:

  • The ASI provided a more nuanced measure of antimicrobial exposure than DOT.
  • Interventions aimed at narrowing antibiotic spectrum showed a measurable impact via ASI.
  • ASI demonstrated utility in identifying opportunities for stewardship.

Conclusions:

  • The antibiotic spectrum index is a valuable tool for antimicrobial stewardship.
  • ASI enhances the assessment of antimicrobial use in vulnerable populations like VLBW infants.
  • Implementing ASI can lead to more effective stewardship interventions and improved outcomes.

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