title: Penicillin and its effect in producing a predominant gram-negative bacillary flora in upper respiratory tract of children.
authors.forename: F D
authors.initials: FD
authors.lastname: HAFFNER
authors.forename: E
authors.initials: E
authors.lastname: NETER
authors.forename: M I
authors.initials: MI
authors.lastname: RUBIN
mesh_terms: D002648:Child; D006090:Gram-Negative Bacteria; D006801:Humans; D009666:Nose; D010406:Penicillins; D014132:Trachea; D012122:Ventilators, Mechanical
chemical_list: D010406:Penicillins