TABLE 1.

Characteristics of the diarrheagenic E. coli and control strains studied

Isolate	No. tested	Characteristics	References
EAEC O42	1	An EAEC clinical isolate from the stool of a child with diarrhea in Peru; in published studies, EAEC O42 stimulates IL-8 release	19, 26, 27
ETEC ST	11	ST probe-positive isolates from U.S. travelers to Guadalajara, Mexico	12, 18
ETEC LT	10	LT probe-positive isolates from U.S. travelers to Guadalajara, Mexico	12, 18
ETECT ST:LT	8	Both ST and LT probe-positive isolates from U.S. travelers to Guadalajara, Mexico	12, 18
EAEC	30	E. coli strains, negative for ST or LT probes, that adhere to HEp-2 cells in an aggregative pattern, from U.S. travelers to Guadalajara, Mexico	12, 18
HS	1	Commensal reference strain obtained from an asymptomatic adult that is nonpathogenic; it is not EAEC, ETEC, or EPEC