TABLE 1.

E. faecium strains used in this work

Published or laboratory strain nomenclatureNomenclature used for this workRelevant characteristicsaPresence of hylEfmReference
TX0016 (DO)AClinical isolate from the United States; Eryr Strr, ST-16Yes19
ERV-99BClinical isolate from Colombia; Vanr Genr, ST-18YesThis study
C-68CClinical isolate from the United States; Vanr, ST-16Yes4
TX1330TX1330Susceptible fecal-colonizing strain from a healthy human volunteerNo19
TX1330RFTX1330RFDerivative of TX1330; Fusr RifrNoThis study
TX2158TX1330RF-A1Derivative of TX1330RF to which the hylEfm-containing plasmid was transferred by conjugation from strain A as donor; Eryr StrrYesThis study
TX6068TX1330RF-B1Transconjugant resulting from a mating expt between strain B (donor) and TX1330RF (recipient); Vanr Eryr Genr StrrYesThis study
TX6069TX1330RF-B2Transconjugant resulting from a mating expt between strain B (donor) and TX1330RF (recipient); Vanr GenrYesThis study
D344SRFD344SRFLaboratory strain with spontaneous loss of pbp5; Fusr RifrNo23
TC6D344SRF-C6Transconjugant resulting from a mating expt between strain C (donor) and D344SRF (recipient)Yes24
  • a Eryr, erythromycin resistance; Fusr, fusidic acid resistance; Genr, HLR to gentamicin; Rifr, rifampin resistance; Strr, HLR to streptomycin; Vanr, vancomycin resistance.