Invasiveness as a putative additional virulence mechanism of some atypical Enteropathogenic Escherichia colistrains with different uncommon intimin types

Table 1 Characteristics of the aEPEC strains studied.

Strain	Serotype	Intimin Type	Adherence pattern	FAS test
				HeLa cells	T84 cells
0621-6	ONT:H^-	σ *	LA	+	+
1551-2	ONT:H^-	ο	LA	+	+
1632-7	O26:H^-	upsilon; **	DA	+	+
1871-1	O34:H^-	θ2 **	LAL	+	+
4051-6	O104:H2	ο	AA	+	+
4281-7	O104:H^-	τ**	LAL	+	+
E2348/69	O127:H6	α1	LA	+	+

Adhesion pattern detected on HeLa cells: localized adherence (LA), localized adherence like (LAL), aggregative adherence (AA) and diffuse adherence (DA) (Vieira et al., 2001). (*) Strains that had eae gene sequenced in this study and (**) strains that carry new intimin subtypes (GenBank accession numbers: 1871-1 (FM872418); 4281-7 (FM872416) and 1632-7 (FM872417).

ISSN: 1471-2180