“…20 C. trachomatis cure rates after erythromycin have ranged from 92 to 95% with 1,600-2,000 mg daily doses for 7 days 20,22 to 76-88% with 1,000-2,000 mg daily doses for 7-14 days. 11,21 Direct comparisons of 1,000 vs. 2,000 mg daily doses of erythromycin have not been performed during pregnancy, but in non-pregnant women, one study has suggested that the 1,000 mg dose appears to be less effective than the 2,000 mg daily dose. C. trachomatis was recovered after therapy in 27% of 45 non-pregnant women given 1,000 mg and 10% of 31 nonpregnant women given 2,000 mg. 23 The low recovery rate in the placebo group was unexpected since other studies have shown that C. trachomatis persists in 85-90% of untreated non-pregnant 23,24 and 71-75% of untreated pregnant women.…”