Treatment of chlamydial conjunctivitis in newborns and adults with erythromycin and roxithromycin

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Abstract
A randomized single-blind study of the effects of erythromycin and roxithromycin on chlamydial conjunctivitis was performed on a group of patients, comprising 28 newborns and 27 adults. Treatment used was either 200 mg of erythromycin ethylsuccinate or 50 mg of roxithromycin daily, divided into two doses for the neonatal group or for the adult group, 1000 mg of erythromycin stearate or 300 mg of roxithromycin daily divided into two doses. All patients were treated for ten days. Clinically nine of the neonates sad 13 of the adults had unilateral conjunctivitis, whilst the remaining cases wen bilateral. At follow-up one month after commencing therapy, all but one (erythromycin-treated) of the 28 neonates and three (two of whom were erythromycin-treated) of the 27 adults were cured. However, 16 (nine neonates and seven adults) were culture-positive for Chlamnydia trachomatis in samples from eye and/or nasopharynx. The culture-positive group comprised ten cases (four neonates and six adults) who had been treated with erythromycin and six (five neonates and one adult) with roxithromycin. No major side effects of the therapy were seen. The study indicates that there was no difference in the clinical are rate for the two drug either in neonates or in adults. However, the isolation rate of chlamydiae in the adult group differed, with 12 (92%) of the 13 roxithromycin-treated cases becoming culture-negative. whilst this was true for only eight (57%) of the 14 erythromycin-treated cases (P < 0·007).

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