Minimum inhibitory concentrations (MICs) for these strains were determined by the microbiology laboratory at Le Bonheur Children's Hospital using the E-test method: both strains were fully susceptible to vancomycin and daptomycin (LAC: MIC vancomycin 1.0 μg/mL; daptomycin 0.75 μg/mL; MW2: MIC vancomycin < 0.5 μg/mL; daptomycin 0.75 μg/mL).