Recurrent erysipelas: predisposing factors and costs of prophylaxis.

After an average follow-up time of three years, recurrent erysipelas was observed in 29% of 143 patients admitted primarily with erysipelas. Nineteen patients (13%) had two or more recurrences during this period. The predisposing factor with the highest recurrence rate was venous insufficiency. Regular prophylaxis with phenoxymethylpenicillin (or erythromycin in penicillin allergics) after the second recurrence may be cost-effective. This antibiotic prophylaxis is only recommended in patients with predisposing factors who have suffered severe attacks.