Table 2.

Speeds for wild-type bacteria and straight rod mutants swimming in broth and viscous media.

Solution	Strain		n	Inst. values	vavg (μm/s)	vm (μm/s)	vmax (μm/s)	σ	K-S p-valuec	% reduction to vm relative to WT
BB10		B128	99	2105	6.6	5.5	28.0	4.3
	LSH100	WT	100	2538	6.8	5.7	48.0	4.7	0.0955	7%
		Δcsd6	100	2058	6.5	5.3	30.1	4.1
	PMSS1	WT	100	1975	11.6	10.8	49.2	6.3	<0.0001	11%
		Δcsd6	100	1930	10.5	9.6	38.8	6.0
PGMa 15 mg mL−1		B128	100	2112	11.7	12.5	36.6	5.5
	LSH100	WT	100	3325	6.7	6.5	29.1	3.8	<0.0001	11%
		Δcsd6	100	3886	6.2	5.8	22.8	3.6
	PMSS1	WT	100	2073	11.8	12.2	39.3	5.3	<0.0001	11%
		Δcsd6	100	2550	10.7	10.8	28.4	3.6
PGM 30 mg mL−1		B128	100	2752	6.7	6.5	41.9	3.7
	LSH100	WT	100	2790	6.6	6.4	30.1	4.2	0.0005	8%
		Δcsd6	100	2951	6.3	5.9	33.3	4.2
	PMSS1	WT	100	2224	11.3	11.8	34.8	4.7	<0.0001	13%
		Δcsd6	100	2276	9.7	10.3	24.8	4.4
MCb 10 mg mL−1	LSH100	WT	100	2076	9.5	8.8	46.1	5.2	<0.0001	10%
		Δcsd6	100	2151	8.6	7.9	39.4	5.0
	PMSS1	WT	100	1874	13.2	14.2	32.2	5.8	<0.0001	21%
		Δcsd6	100	2251	10.6	11.2	24.2	4.6
MC 15 mg mL−1	LSH100	WT	100	3194	5.5	4.8	26.1	3.3	<0.0001	6%
		Δcsd6	100	3544	5.1	4.5	16.6	2.6
	PMSS1	WT	48	965	6.9	6.4	20.6	3.3	0.0104	NRd
		Δcsd6	48	1201	6.8	6.8	17.9	3.4

^aPGM: Purified gastric mucin at pH 6.0.

^bMC: Methylcellulose.

^cFor K-S tests used to compare WT to mutant cumulative distributions of swimming speeds, p-values < 0.05 are considered significant.

^dNR: No reduction.