following production of primary chancres by intradermal inoculation of 10 ( 6 ) treponema pallidum , groups of six rabbits were treated with benzathine penicillin ( 200,000 units im weekly for two weeks ) , erythromycin base ( 30 mg/kg/day orally four times daily for 15 days ) or azithromycin ( 30 mg/kg/day given orally once or twice daily for 15 days ) ;
C0014806
erythromycin base
C0052796
azithromycin