Table 2.

Attachment of STm wild-type and mutant strains to lettuce leaf.

	Number of microscope fields out of 90 (means ± SD)
	harboring mCherry-tagged STm cells
Strains	0	1–10	10–50	50–100	100 ≤
wt	0	4 ± 3	53 ± 11	23 ± 6	8 ± 8
ΔynaF	0	1 ± 0.5	47 ± 14	28 ± 11	13 ± 8
ΔuspAB	0	16 ± 7	47 ± 10	16 ± 6	6 ± 4
ΔydaA	0	5 ± 3	57 ± 11	17 ± 6	10 ± 10
ΔyecG	0	21 ± 7	47 ± 12	10 ± 3	10 ± 10
ΔybdQ	0	11 ± 7	48 ± 9	27 ± 8	4 ± 4