TABLE 6.

Inhibition of invasion of GBS to ME-180 and A549 cells using pilus protein-deficient isogenic mutants

Cell lines	GBS serotypes	Inhibition of invasion
		Δgbs80	Δgbs67	Δsan1518
ME-180	Ia	65 ± 1	NAa	2 ± 0.5b
	III	82 ± 2.2	NA	47 ± 2
	V	28 ± 2.6b	70 ± 2	NA
	VII	12 ± 2b	26 ± 1.4b	3 ± 1b
A549	Ia	27 ± 5.3b	NA	75 ± 3.5
	III	39 ± 4	NA	71 ± 2.8
	V	9 ± 2b	0.5 ± 0.25b	NA
	VII	47 ± 2.2	48 ± 1	95 ± 4

^a NA, not applicable.

^b Not significant; all other inhibition data are significant at p < 0.05.