National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine research support u.s. gov't non-p.h.s. female male aged middle aged Comparative Study Prospective Studies risk factors drug resistance staphylococcal infections / microbiology staphylococcus aureus / drug effects staphylococcus aureus / isolation & purification hospitals microbial* bacterial infections / microbiology* gram-negative bacteria / isolation & purification gram-negative bacterial infections / epidemiology gram-negative bacterial infections / microbiology staphylococcal infections / epidemiology bacterial infections / epidemiology methicillin resistance veterans enterococcus / drug effects pmid:7930330 doi:10.1111/j.1532-5415.1994.tb06210.x m s terpenning s f bradley c a kauffman carrier state / drug therapy carrier state / epidemiology carrier state / microbiology* enterococcus / isolation & purification gentamicins / pharmacology gram-negative bacteria / drug effects long-term care michigan / epidemiology mupirocin / therapeutic use nursing homes / statistics & numerical data*