title: Improvement of the nasopharyngeal swab method of diagnosis in pertussis by the use of penicillin.
authors.forename: W L
authors.initials: WL
authors.lastname: BRADFORD
authors.forename: E
authors.initials: E
authors.lastname: DAY
authors.forename: G P
authors.initials: GP
authors.lastname: BARRY
mesh_terms: D010406:Penicillins; D014917:Whooping Cough / Q000175:diagnosis*
chemical_list: D010406:Penicillins
keywords: WHOOPING COUGH/diagnosis