title: Persisting virulence of T. pallidum after incubation with penicillin in Nelson-Mayer medium.
mesh_terms: D000818:Animals; D002455:Cell Division; D003470:Culture Media; D007267:Injections; D008297:Male; D009920:Orchitis / Q000209:etiology; D010400:Penicillin G / Q000494:pharmacology*; D011817:Rabbits; D013737:Testis; D014210:Treponema pallidum / Q000187:drug effects / Q000472:pathogenicity*; D014774:Virulence / Q000187:drug effects
chemical_list: D003470:Culture Media; D010400:Penicillin G