Table 1. Results of polymerase chain reaction for vanR/vanS and antimicrobial susceptibility for 77 sterile-site Enterococcus faecium isolates stratified by VRE and VVE.
| Total | VRE | VVE | ||
|---|---|---|---|---|
| vanA+ | vanB+ | vanA+ | ||
| Total | 77 (100%) | 44 (100%) | 4 (100%) | 29 (100%) |
| Prospective | 40 (52%) | 20 (46%) | 2 (50%) | 18 (62%) |
| Retrospective | 37 (48%) | 24 (54%) | 2 (50%) | 11 (38%) |
| vanR/S-positive | 47 (61%) | 38 (86%) | 0 (0%) | 9 (31%) |
| Resistant to | ||||
| Vancomycin | 46 (60%) | 44 (100%) | 2 (50%) | 0 (0%) |
| Ampicillin | 77 (100%) | 44 (100%) | 4 (100%) | 29 (100%) |
| Linezolid | 1/76 (1%) | 0 (0%) | 0 (0%) | 1/28a (4%) |
| Daptomycin | 0/76 (0%) | 0 (0%) | 0 (0%) | 0/28a (0%) |
VRE, Vancomycin-resistant enterococci (i.e. vanA-positive and vancomycin-resistant OR vanB-positive); VVE, Vancomycin-variable enterococci (i.e. vanA-positive and vancomycin-susceptible)
aOne VVE isolate was not stored and susceptibility testing for linezolid and daptomycin could not be performed