The effect of long-term intermittent trimethoprim/sulfamethoxazole treatment on recurrences of toxoplasmic retinochoroiditis

Claudio Silveira, Rubens Belfort, Cristina Muccioli, Gary N. Holland, Cesar G. Victora, Bernardo L. Horta, Fei Yu, Robert B. Nussenblatt

Research output: Contribution to journalArticle

Abstract

PURPOSE: To determine the effect of long-term intermittent trimethoprim/sulfamethoxazole treatment on recurrences of toxoplasmic retinochoroiditis. DESIGN: Prospective randomized open-labeled interventional clinical trial. METHODS: A total of 124 patients with a history of recurrent toxoplasmic retinochoroiditis were randomized to treatment with one tablet of trimethoprim (160 mg)/sulfamethoxazole (800 mg) (Bactrim F; Roche Pharmaceuticals, Rio de Janeiro, Brazil) every 3 days (61 patients) or to observation without treatment (63 patients) and were followed monthly for up to 20 consecutive months for clinical signs of disease recurrence. A recurrence was defined as a new focus of necrotizing retinochoroiditis with active inflammation either adjacent to or remote from preexisting retinochoroidal scars. RESULTS: Recurrences developed in four (6.6%) treated patients and in 15 (23.8%) controls (P = .01). Treatment was discontinued prematurely in four patients because of mild drug reactions. CONCLUSION: Long-term intermittent treatment with trimethoprim/sulfamethoxazole can reduce the rate of recurrent toxoplasmic retinochoroiditis.

Original languageEnglish (US)
Pages (from-to)41-46
Number of pages6
JournalAmerican Journal of Ophthalmology
Volume134
Issue number1
DOIs
StatePublished - 2002
Externally publishedYes

ASJC Scopus subject areas

  • Ophthalmology

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    Silveira, C., Belfort, R., Muccioli, C., Holland, G. N., Victora, C. G., Horta, B. L., Yu, F., & Nussenblatt, R. B. (2002). The effect of long-term intermittent trimethoprim/sulfamethoxazole treatment on recurrences of toxoplasmic retinochoroiditis. American Journal of Ophthalmology, 134(1), 41-46. https://doi.org/10.1016/S0002-9394(02)01527-1