TABLE 3.

Shiga toxin subtyping of E. coli O157:H7 and non-O157 isolates

Shiga toxin	Prevalence (no. [%]) of:
	O157:H7 (n = 89)	Clinical non-O157 (n = 39)	Cattle non-O157 (n = 19)
Shiga toxin gene
stx1	67 (72.8)	31 (79.5)	16 (80.0)
stx2	89 (100.0)	14 (35.9)	7 (36.8)
Shiga toxin gene subtype
stx1a	0 (0)	22 (56.4)	12 (63.2)
stx1a, stx2a	67 (75.3)	5 (12.8)	1 (5.3)
stx1a, stx2a, stx2d	0 (0)	0 (0)	1 (5.3)
stx1a, stx2d	0 (0)	0 (0)	2 (10.5)
stx1c	0 (0)	1 (2.6)	0 (0)
stx1 NT	0 (0)	2 (5.1)	0 (0)
stx1 NT, stx2a	0 (0)	1 (2.6)	0 (0)
stx2a	19 (21.3)	5 (12.8)	1 (5.3)
stx2a, stx2c	3 (3.4)	0 (0)	0 (0)
stx2c	0 (0)	2 (5.1)	0 (0)
stx2d	0 (0)	1 (2.6)	0 (0)
stx2 NT	0 (0)	0 (0)	2 (10.5)