TABLE 1.

Cellular dimensions and average RMS surface roughness of colistin-susceptible and -resistant (ATCC 19606 Col10) cells of A. baumannii ATCC 19606 at different growth phases

Growth phaseSusceptibleResistant
Width (μm)Length (μm)Avg RMS surface roughness (nm)Diam (μm)Avg RMS surface roughness (nm)
Early log0.98 ± 0.07a1.65 ± 0.27a7.05 ± 1.3b,c1.03 ± 0.09a11.4 ± 2.5b,c
Mid-log1.03 ± 0.10a1.61 ± 0.21a7.65 ± 1.7b,c0.97 ± 0.11a11.4 ± 2.0b,c
StationaryNDdND6.71 ± 1.7b,cND11.6 ± 2.3b,c
  • a Not significantly different from corresponding dimension across growth phases (P > 0.05).

  • b Not significantly different across growth phases (P > 0.05).

  • c Significantly different between susceptible and resistant cells for a given growth phase (P < 0.05).

  • d ND, not determined due to marked morphological heterogeneity.