title: Treatment failure with penicillin in early syphilis.
abstract: A patient with primary syphilis had a recurrence of his penile chancre after generally acceptable penicillin treatment. Retreatment with a similar but extended penicillin regimen was successful. This is the first report of such a treatment failure.
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D010402:Penicillin G Procaine / Q000627:therapeutic use; D010403:Penicillin Resistance; D012008:Recurrence; D013587:Syphilis / Q000188:drug therapy*; D013997:Time Factors
chemical_list: D010402:Penicillin G Procaine