Systemic antibiotics for use in ocular infections--penicillin-resistant Staphylococcus

Area of Science:

• Ophthalmology
• Infectious Diseases
• Pharmacology

Background:

• Bacterial endophthalmitis is a severe intraocular infection.
• Staphylococcus species are frequent causes, especially post-ocular trauma.
• Effective systemic antibiotic treatment is crucial for vision preservation.

Purpose of the Study:

• To analyze the efficacy of various antibiotics for systemic treatment of bacterial endophthalmitis.
• To guide the selection of appropriate antibiotics based on causative organisms and drug properties.

Main Methods:

• Review of existing literature on antibiotic use in bacterial endophthalmitis.
• Analysis of antibiotic penetration into ocular tissues (blood-aqueous barrier).
• Evaluation of antibiotic spectrum of activity (gram-positive and gram-negative coverage).

Main Results:

• Methicillin is a viable option for gram-positive endophthalmitis due to extensive clinical experience.
• Oxacillin demonstrates poor penetration of the blood-aqueous barrier, limiting its systemic use.
• Cephaloridine offers excellent intraocular penetration and gram-negative coverage, potentially optimal for patients with normal renal function.

Conclusions:

• Antibiotic selection for bacterial endophthalmitis requires careful consideration of drug penetration and spectrum.
• Methicillin is recommended for gram-positive infections.
• Cephaloridine presents a promising option for broad-spectrum coverage in specific patient populations.