TABLE 1.

Assessment of swarming and swimming abilities of P. mirabilis B4 and transposon mutants

GroupStrainAgar swarming indexaAgar swimming indexaCatheter bridge migration indexb
All siliconeHydrogel-coated latex
Wild typeB410010066.67100
1, Control mutantsBVJ14167.810041.67100
BVJ12110.110041.67100
BVJ1510595.516.67100
2, Poor-swarming mutantsNS7716.9574.616.6758.33
G7715.2586.1075
PS9210.17106.1075
G78036.98.3358.33
G64028.5058.33
3, Nonswarming mutantsG93042.30066.67
G37040050
G33032.3033.3
4, Nonswimming, nonswarming mutantsNS630000
  • a Swimming and swarming indices are expressed as percentages of those of the wild type as described in Materials and Methods.

  • b The migration index was calculated as the percentage of catheter bridges crossed by each strain in 12 replicate experiments.