TABLE 3.

Virulence factors of strains O2-1772 and O78-9 in the different stages of infection

Infection stage	Virulence factor(s) of strain		Reference(s) or source
	O78-9	O2-1772
Adhesion	AC/I pilus		6
		P pilus	This work
	Type 1 pilus	Type 1 pilus	17
	Nonfimbrial adhesin		This work
Internalization	Curli fibers	Curli fibers	10
Invasion	TTSS	TTSS	D. Ideses et al., unpublished data
Persistence in the host, iron uptake	Enterobactin	Enterobactin	R. S. Adiri et al., unpublished data
	Aerobactin	Aerobactin	5, 11
	Yersiniabactin	Yersiniabactin	10; this work
	IroN receptor	IroN receptor	This work
		sitABCD	This work
Persistence in the host, immune evasion	Yersiniabactin O antigen	Yersiniabactin O antigen, polysaccharide capsule	4