Table 4.
Effect | Number (%) of isolates affected by | |||
---|---|---|---|---|
Gentamicin (GEN) | Oxacillin (OXA) | Vancomycin (VAN) | GEN, OXA, VAN | |
Reduction | 2 (8) | 7 (29) | 14 (64) | 14 (64) |
Enhancement | 0 (0) | 2 (8) | 0 (0) | 0 (0) |
None | 22 (92) | 15 (63) | 10 (36) | 10 (36) |
a After overnight antibiotic exposure, the difference in OD600 values between test biofilms and antibiotic-free wells, if greater than intra-microplate variability, were defined as significant; a decrease was considered a reduction and an increase was considered an enhancement.