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Application of topical lomefloxacin against experimental Pseudomonas endophthalmitis in rabbits
1Department of Ophthalmology, Yokohama City University School of Medicine, Japan.
Abstract:
Lomefloxacin is a new quinolone compound with a broad antibacterial spectrum and excellent penetration into the aqueous humor by topical application. Therefore, an experimental study was done to evaluate the efficacy of topical lomefloxacin against experimental endophthalmitis with Pseudomonas aeruginosa. Lomefloxacin eye drops were instilled six times a day onto infected rabbit eyes and gentamicin, sulbenicillin and saline were also tested comparatively in the same manner as lomefloxacin. Clinical observation for 1 week and counting viable pseudomonas cell numbers in the anterior chamber were done. Among all topical eye drops tested, lomefloxacin was shown to be most effective in lowering clinical scores and viable cell numbers in the anterior chamber. In conclusion, lomefloxacin is expected to be a useful ophthalmic solution in the treatment of pseudomonal endophthalmitis.
Insights
Topical lomefloxacin demonstrated superior efficacy in treating experimental Pseudomonas aeruginosa endophthalmitis in rabbits. This new quinolone effectively reduced clinical signs and bacterial load in the anterior chamber.
Area of Science:
- Ophthalmology
- Infectious Diseases
- Pharmacology
Background:
- Endophthalmitis caused by Pseudomonas aeruginosa poses a significant threat to vision.
- Topical antibiotics are crucial for treating ocular infections.
- Lomefloxacin, a novel quinolone, exhibits broad-spectrum activity and good ocular penetration.
Purpose of the Study:
- To evaluate the efficacy of topical lomefloxacin eye drops.
- To compare lomefloxacin with gentamicin, sulbenicillin, and saline.
- To assess treatment against experimental Pseudomonas aeruginosa endophthalmitis.
Main Methods:
- Induction of experimental endophthalmitis in rabbit eyes.
- Topical administration of lomefloxacin, gentamicin, sulbenicillin, and saline eye drops six times daily.
- Clinical scoring and enumeration of viable Pseudomonas aeruginosa in the anterior chamber over one week.
Main Results:
- Lomefloxacin significantly reduced clinical scores compared to control groups.
- Topical lomefloxacin markedly decreased viable Pseudomonas aeruginosa cell numbers in the anterior chamber.
- Lomefloxacin exhibited superior efficacy over gentamicin and sulbenicillin in this model.
Conclusions:
- Topical lomefloxacin is a highly effective treatment for Pseudomonas aeruginosa endophthalmitis.
- Lomefloxacin shows promise as a valuable ophthalmic solution for bacterial endophthalmitis.
- Further clinical studies are warranted to confirm these findings in human patients.