title: Meningococci with increased resistance to penicillin.
authors.forename: E
authors.initials: E
authors.lastname: Pérez-Trallero
authors.forename: L
authors.initials: L
authors.lastname: Aldamiz-Echeverria
authors.forename: E G
authors.initials: EG
authors.lastname: Pérez-Yarza
mesh_terms: D000293:Adolescent; D000667:Ampicillin / Q000627:therapeutic use*; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008585:Meningitis, Meningococcal / Q000188:drug therapy*; D008826:Microbial Sensitivity Tests; D009345:Neisseria meningitidis / Q000187:drug effects*; D010400:Penicillin G / Q000627:therapeutic use*; D010403:Penicillin Resistance
chemical_list: D000667:Ampicillin; D010400:Penicillin G