Quantitative comparison of fluoroquinolone therapies of experimental gram-negative bacterial keratitis.

Abstract:

PURPOSE:To determine the effectiveness of topically applied fluoroquinolones for experimental Pseudomonas or Serratia keratitis. METHODS:Bacteria were injected intrastromally (10(3) colony forming units [CFU]). From 16 to 22 hours post-infection (PI), a single topical drop of moxifloxacin (Vigamox, 0.545%), levofloxacin (Quixin, 0.5%), ofloxacin (Ocuflox, 0.3%) or ciprofloxacin (Ciloxan, 0.3%) was applied every 30 minutes. At 23 hours PI, corneas were cultured quantitatively. RESULTS:For Pseudomonas keratitis, untreated eyes contained 7 log CFU/cornea and antibiotic-treated eyes demonstrated a > or = 5-log reduction in CFU/cornea (p < or = 0.0001). Moxifloxacin, levofloxacin, or ciprofloxacin therapies were not significantly different from each other (p > or = 0.67). For Serratia keratitis, untreated eyes contained 7 logCFU/cornea whereas treated eyes had a > or = 2-log reduction (p < or = 0.0001). Moxifloxacin therapy proved most effective (p < or = 0.001). CONCLUSIONS:Overall, moxifloxacin was the most effective of the four fluoroquinolones in reducing CFU/cornea in the rabbit model of gram-negative keratitis.

journal_name

Curr Eye Res

journal_title

Current eye research

authors

Thibodeaux BA,Dajcs JJ,Caballero AR,Marquart ME,Girgis DO,O'Callaghan RJ

doi

10.1076/ceyr.28.5.337.28676

subject

Has Abstract

pub_date

2004-05-01 00:00:00

pages

337-42

issue

5

eissn

0271-3683

issn

1460-2202

journal_volume

28

pub_type

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