Staphylococcus aureus is one of the most prevalent pathogens in hospitalized patients and is a common cause of infection. It is annually associated with 2.7 million additional days of patient hospitalization, 12,000 additional inpatient deaths, and excess costs of $9.5 billion in the United States-a significant medical and economic burden. People infected with methicillin-resistant strains of Staphylococcus aureus (MRSA) have longer hospital stays and higher total costs compared with those infected by methicillin-susceptible strains... 
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