Table 1. Bacterial strains used in this study.

Strains	Description	References
EPEC strain E2348/69	Wild-type strain (serotype O127:H6 belonging to E. coli phylogroup B2), originally isolated from an outbreak of diarrhea in children, isolated in Taunton, UK	(31)
EPEC strain LDI001	Wild-type strain isolated from feces of a undernourished child without diarrhea in Fortaleza, CE, Brazil	(12)
EPEC strain UMD731	ΔescF; lacks functioning T3SS	(15)
ΔescF/escF EPEC strain	T3SS restored	(15)
E. coli strain HS	Nonpathogenic E. coli	(40)

EPEC: enteropathogenic Escherichia coli.