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Updated: Jul 20, 2026

Intravitreal Injection and Quantitation of Infection Parameters in a Mouse Model of Bacterial Endophthalmitis
07:24

Intravitreal Injection and Quantitation of Infection Parameters in a Mouse Model of Bacterial Endophthalmitis

Published on: February 6, 2021

Intracameral antibiotic agents for endophthalmitis prophylaxis: a pharmacokinetic model

Peter E Libre1, Phyllis Della-Latta, Nai Xun Chin

  • 1Columbia University, New York, New York, USA. plibre@optonline.net

Journal of Cataract and Refractive Surgery
|October 3, 2003
PubMed
Abstract

Insights

Intracameral vancomycin shows promise in preventing Staphylococcus aureus endophthalmitis by inhibiting bacterial growth in the eye. This may enhance the eye's natural defenses post-surgery.

Area of Science:

  • Ophthalmology
  • Infectious Diseases
  • Pharmacology

Background:

  • Endophthalmitis is a severe intraocular infection often caused by Staphylococcus aureus.
  • Prophylaxis against post-operative endophthalmitis is crucial for patient outcomes.

Purpose of the Study:

  • To evaluate the in vitro efficacy of intracameral antibiotics against Staphylococcus aureus.
  • To determine the potential of vancomycin and piperacillin/tazobactam as prophylactic agents for endophthalmitis.

Main Methods:

  • Staphylococcus aureus strains were incubated with vancomycin or piperacillin/tazobactam in vitro.
  • Antibiotic concentrations were serially halved to mimic anterior chamber half-life.
  • Bacterial viability was assessed by measuring colony-forming units (CFU)/mL over 8 hours.

Main Results:

  • Vancomycin significantly inhibited methicillin-resistant S. aureus growth, resulting in 1000-fold higher CFU/mL in controls after 8 hours.
  • Piperacillin/tazobactam demonstrated potent activity, nearly eliminating one strain and reducing another's CFU/mL by 1000-fold.

Conclusions:

  • Intracameral vancomycin exhibits inhibitory effects on Staphylococcus aureus in simulated anterior chamber conditions.
  • These findings suggest intracameral vancomycin could be a viable prophylactic strategy against S. aureus endophthalmitis, potentially aiding the eye's immune response.

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