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Comparison of topical 0.3% ofloxacin to fortified tobramycin-cefazolin in the therapy of bacterial keratitis.

Author(s): Khokhar S, Sindhu N, Mirdha BR

Affiliation(s): Dr Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi. khokhar@medinst.ernet.in

Publication date & source: 2000-05, Infection., 28(3):149-52.

Publication type: Clinical Trial; Randomized Controlled Trial

BACKGROUND: In this study we compared topical ofloxacin with a combination of fortified tobramycin sulphate and cefazolin sodium solutions in the treatment of culture-proved bacterial keratitis. METHODS: 30 eyes of culture-proved bacterial corneal ulcers of moderate severity were included in a prospective randomized, controlled, double-masked study for comparison. The cases were randomly allocated to treatment with 0.3% ofloxacin solution (Group I) and combination of fortified antibiotics (1.5% tobramycin and 5% cefazolin solutions--Group II as control) along with supportive cycloplegic, vitamins and antiglaucoma therapy. Time for healing of ulcer and subjective symptoms were main outcome measures. Student's t-test was used to compare the results. RESULTS: Staphylococcus aureus and coagulase-negative staphylococci were the two most common organisms isolated. Resolution of the ulcer was achieved in 93% and 87% in the treated and the control group, respectively. The mean duration of symptomatic relief was 7.8 +/- 1.54 days in the treated group and 8.33 +/- 1.44 days in the control group; for epithelial healing it was 15.0 +/- 3.86 days in the treated group and 15.46 +/- 3.86 days in the control group. Post resolution the best corrected visual acuity of 20/200 or better was achieved in all but one eye each in both groups. CONCLUSIONS: Both ofloxacin 0.3% and combined fortified tobramycin 1.5% and cefazolin 5% topical drops were comparable for treating cases of bacterial corneal ulcer of moderate severity. However, considering the easy availability and cost effectiveness of ofloxacin, a monotherapy with ofloxacin may be preferred over the combined, fortified tobramycin and cefazolin therapy.

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