Cory A Hafer

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UNLABELLED A methicillin-resistant Staphylococcus aureus (MRSA) clone known as ST398 has emerged as a major cause of acute infections in individuals who have close contact with livestock. More recently, the emergence of an animal-independent ST398 methicillin-sensitive S. aureus (MSSA) clone has been documented in several countries. However, the limited(More)
Infections with vancomycin-intermediate Staphylococcus aureus (VISA) have been associated with vancomycin treatment failures and poor clinical outcomes. Routine identification of clinical isolates with increased vancomycin MICs remains challenging, and no molecular marker exists to aid in diagnosis of VISA strains. We tested vancomycin susceptibilities by(More)
The methicillin-susceptible Staphylococcus aureus (MSSA) clone sequence type (ST) 398 has increasingly been identified as a pathogen in diverse geographic settings, yet its epidemiology remains incompletely understood. In this case-control study of MSSA infections, we identified ST398 MSSA as both a major community- and hospital-associated MSSA pathogen in(More)
BACKGROUND Community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) infections are spreading, but the source of infections in non-epidemic settings remains poorly defined. METHODS We carried out a community-based, case-control study investigating socio-demographic risk factors and infectious reservoirs associated with MRSA infections.(More)
Extranasal colonization is increasingly recognized as an important reservoir for Staphylococcus aureus among high-risk populations. We conducted a cross-sectional study of multiple body site colonization among 173 randomly selected STD clinic patients in Baltimore, Maryland. Staphylococcal carriage at extranasal sites, including the oropharynx, groin,(More)
Throat carriage (42.7%) of Staphylococcus aureus exceeded nasal carriage (35.0%) in 2 New York prisons. Methicillin resistance, primarily due to USA300, was high at both sites; 25% of dually colonized inmates had different strains. Strategies to reduce S. aureus transmission will need to consider the high frequency of throat colonization.
BACKGROUND The household is a recognized community reservoir for Staphylococcus aureus. This study investigated potential risk factors for intra-household S. aureus transmission, including the contribution of environmental contamination. METHODS We investigated intra-household S. aureus transmission using a sample of multiple member households from a(More)
While much is known about the geographic distribution of different clonal types of methicillin-resistant Staphylococcus aureus (MRSA), few studies have assessed the molecular epidemiology of methicillin-susceptible S. aureus (MSSA), despite its continued clinical importance. In each U.S. Census region, reference laboratories collected successive MSSA(More)
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