Cotton-wool spots as a sign in leptospirosis (Weil's disease).

A 44-year-old black male presented with fever, myalgia and weakness. He had elevated blood urea nitrogen, creatine phosphokinase and serum glutamic-oxaloacetic transaminase. During the first 6 days of this undiagnosed illness azotemia increased, a pericardial friction rub occurred, and hematuria was present. On the 7th day bilateral subconjunctival hemorrhages, anterior uveitis, and peripapillary cotton-wool spots were noted. This combination of findings suggested leptospirosis, which was subsequently confirmed by specific antibody titers. Therapeutic response was achieved with high-dose systemic steroids.