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Br J Ophthalmol 87:1172-1174 doi:10.1136/bjo.87.9.1172
  • Controversies in ophthalmology

Overview: Initial antimicrobial therapy for microbial keratitis

Table 1

Summary of estimated in vivo effective concentration of quinolones required with topical administration. Estimates of tissue concentrations obtained with oral and topical use in ideal conditions

MIC90 (mg/l)
Ciprofloxacin Gatifloxacin/moxifloxacin
S pneumoniae 2 0.12–0.5
S aureus (all) 0.25–2 0.06–0.13
MRSA R 6.25/2.0
Ps aeruginosa 0.5(8) 3–32
Enterobacteriaceae 0.01–0.25 0.01–0.39
Cmax (serum, mg/l) 2.4500 mg po 4.2–4.5400/40 mg po
Aqueous (mg/l) 0.69750 mg X3 po
Cornea (mg/l) 0.60.3% topical

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