Failure of high-dose daptomycin for bacteremia caused by daptomycin-susceptible Enterococcus faecium harboring LiaSR substitutions.

Munita, Jose M; Mishra, Nagendra N; Alvarez, Danya; Tran, Truc T; Diaz, Lorena; Panesso, Diana; Reyes, Jinnethe; Murray, Barbara E et al. · Clin Infect Dis · 2014

case_report · Level V

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Abstract

High-dose daptomycin (DAP) therapy failed in a neutropenic patient with bloodstream infection caused by a DAP-susceptible Enterococcus faecium (minimum inhibitory concentration, 3 µg/mL) harboring genetic changes associated with DAP resistance, with persistent bacteremia and selection of additional resistances. Daptomycin monotherapy should be used cautiously against DAP-susceptible E. faecium strains with minimum inhibitory concentrations >2 µg/mL.

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