title: Long-term study of nasal staphylococci among hospital personnel.
mesh_terms: D001434:Bacteriophage Typing; D002353:Carrier State / Q000453:epidemiology; D003428:Cross Infection; D006801:Humans; D008826:Microbial Sensitivity Tests; D009666:Nose / Q000382:microbiology*; D009873:Operating Rooms; D010403:Penicillin Resistance; D010406:Penicillins / Q000494:pharmacology; D010564:Personnel, Hospital; D013210:Staphylococcus / Q000187:drug effects / Q000302:isolation & purification*; D013204:Staphylococcus Phages
chemical_list: D010406:Penicillins