Abstract

Abstract : Methicillin-resistant Staphylococcus aureus (MRSA) infections are a national concern for public health and hospital officials due to the opportunistic nature of the bacteria and the emergence of resistance to several antibiotics. In 2014, the MRSA incidence rates were 60.0 and 70.5 per 100,000 person years in the Department of Defense (DOD) and the Department of the Navy (DON) beneficiary populations, respectively; this is a 56.8% decrease for the DOD and a 60.4% decrease for the DON since 2005. The majority of MRSA infections within the DOD and DON in 2014 were outpatient, community-associated (CA), and skin and soft tissue infections (SSTIs). Among DOD and DON beneficiaries, MRSA isolates were most susceptible to vancomycin, linezolid, and rifampin, and least susceptible to amoxicillin/clavulanate, ceftriaxone, and cefazolin. The proportion of MRSA cases with inducible clindamycin resistance is increasing, with a 30.1% increase in the DOD and a 51.2% increase in the DON from 2005 to 2014. Military prescription practices in 2014 were consistent with treatments recommended by the Infectious Diseases Society of America (IDSA).

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