Ceftaroline-Resistant, Daptomycin-Tolerant, and Heterogeneous Vancomycin-Intermediate Methicillin-Resistant Staphylococcus aureus Causing Infective Endocarditis
Author(s) -
Masayuki Nigo,
Lorena Díaz,
Lina P Carvajal,
Truc T. Tran,
Rafael Ríos,
Diana Panesso,
Juan David Garavito,
William R. Miller,
Audrey Wanger,
George M. Weinstock,
José M. Munita,
César A. Arias,
Henry F. Chambers
Publication year - 2017
Publication title -
antimicrobial agents and chemotherapy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.07
H-Index - 259
eISSN - 1070-6283
pISSN - 0066-4804
DOI - 10.1128/aac.01235-16
Subject(s) - daptomycin , staphylococcus aureus , microbiology and biotechnology , vancomycin , methicillin resistant staphylococcus aureus , endocarditis , infective endocarditis , medicine , staphylococcal infections , antibiotics , biology , bacteria , surgery , genetics
We report a case of infective endocarditis (IE) caused by ceftaroline-resistant, daptomycin-tolerant, and heterogeneous vancomycin-intermediate methicillin-resistantS. aureus (MRSA). Resistance to ceftaroline emerged in the absence of drug exposure, and the E447K substitution in the active site of PBP2a previously associated with ceftaroline resistance was identified. Additionally, we present evidence of patient-to-patient transmission of the strain within the same unit. This case illustrates the difficulties in treating MRSA IE in the setting of a multidrug-resistant phenotype.
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