TABLE 3.

Swimming, twitching and swarming phenotypes^e

Strain genotype	Zone (mm)		Swarming (% coverage)c
	Swima	Twitchb
WT	28.9 ± 1.9	14.3 ± 1	30
pilG::Tn5B21	29.5 ± 0.7	0	ND
ΔpilJ	37.0 ± 1.0	0	72
ΔchpB	22.0 ± 1.0	13.3 ± 0.4	<10
flgK::Tn5B30	0	ND	0
pilB::Tn5B21	ND	0	ND
sadB	NDd	NDd	63

^aThe diameter of the circular zone of motility formed on 0.3% agar plates after 24 h incubation at 37°C, as reported previously (32).

^bThe diameter of the circular zone of motility formed on 1.5% agar after 24 h incubation at 37°C, followed by 24 h at 25°C, as reported previously (32).

^cSwarming is presented as the percentage of the agar plate covered, as reported previously (3).

^dWe reported previously that a sadB mutant has no swimming or twitching defect (2).

^eND, not determined.