Table 1.

Motility parameters of single wt and csgA cells during starvation

Hr of starvation	Gliding speed, μm/min*		Duration of gliding interval, min†		Duration of stop interval, min‡		Stop frequency, stop/min§		Reversal frequency, reversal/min¶
	wt	csgA	wt	csgA	wt	csgA	wt	csgA	wt	csgA
0	0.74 ± 0.08	0.87 ± 0.07	1.69 ± 0.43	2.18 ± 0.49	3.12 ± 0.33	3.23 ± 0.48	0.56 ± 0.05	0.49 ± 0.11	0.09 ± 0.05	0.11 ± 0.01
3	0.68 ± 0.02	0.54 ± 0.03	1.31 ± 0.30	1.41 ± 0.21	3.38 ± 0.35	3.29 ± 0.30	0.58 ± 0.12	0.59 ± 0.07	0.06 ± 0.02	<0.05
6	1.06 ± 0.02	0.65 ± 0.08	4.38 ± 0.80	1.59 ± 0.32	3.53 ± 0.71	3.44 ± 0.35	0.18 ± 0.04	0.55 ± 0.06	0.13 ± 0.04	<0.03
9	1.75 ± 0.26	0.67 ± 0.03	3.61 ± 0.36	1.33 ± 0.07	3.06 ± 0.44	2.57 ± 0.24	0.22 ± 0.03	0.69 ± 0.05	0.23 ± 0.01	0.02 ± 0.01
12	2.07 ± 0.10	0.84 ± 0.14	4.73 ± 0.36	2.00 ± 0.92	2.93 ± 1.17	2.00 ± 0.25	0.14 ± 0.01	0.62 ± 0.25	0.14 ± 0.01	0.05 ± 0.04
15	2.16 ± 0.19	0.80 ± 0.15	5.10 ± 0.34	1.42 ± 0.32	3.91 ± 0.87	4.52 ± 0.46	0.14 ± 0.03	0.75 ± 0.17	0.15 ± 0.05	0.11 ± 0.03

The mean values and standard errors of the mean are shown for three independent experiments. Strains used: wt, DK5204; csgA, DK5253. 

^*Mean gliding speed was calculated by using only transient gliding speeds >0.35 μm/min, the lower detection limit for active movement. 

^†A gliding interval was the period of time between a start and a stop. 

^‡A stop interval was the period of time between a stop and a start. 

^§Stop frequency was calculated as the number of stops per minute of gliding with transient speeds >0.35 μm/min. 

^¶Reversal frequency was calculated as the number of gliding reversals per minute of gliding with transient speeds >0.35 μm/min.