Table 2.

Serotypes and virulence genes in VTEC strains isolated from cattle^a

Source and serotype	No. of strains	vt genotype (no. of strains)	No. of strains positive for:
			subAB1	subAB2	saa	tia	ehxA	eae
Healthy cattle
O2:HNDb	1	vt2 (1)	1	0	1	0	0	0
O4:HND	1	vt2 (1)	0	0	0	1	0	0
O5:HNMc	1	vt1 (1)	0	0	0	0	1	1
O8:HND	4	vt2 (4)	0	2	0	2	0	0
O21:HND	1	vt2 (1)	0	0	1	0	1	0
O22:HND	3	vt2 (1), vt1 + vt2 (2)	0	0	2	1	3	0
O23:HND	1	vt1 + vt2 (1)	0	0	1	0	1	0
O74:HND	1	vt2 (1)	0	0	1	0	1	0
O84:H2	1	vt1 (1)	0	0	0	0	1	1
O87:HND	1	vt1 (1)	0	0	0	0	0	0
O91:HND	1	vt2 (1)	0	0	1	1	1	0
O98:HNM	1	vt1 (1)	0	0	0	0	1	1
O103:H8	1	vt1 (1)	0	0	0	0	0	1
O110:HND	1	vt1 (1)	0	0	0	0	0	0
O111:HNM	2	vt1 + vt2 (2)	0	0	0	0	2	2
O113:HND	4	vt2 (4)	3	0	3	1	3	0
O116:HND	1	vt2 (1)	1	0	1	0	1	0
O136:HND	1	vt1 (1)	0	0	0	1	0	0
O172:HNM	1	vt2 (1)	0	0	0	0	0	1
O174:HND	2	vt2 (2)	0	0	0	2	1	0
O175:HND	1	vt2 (1)	0	0	0	1	0	0
ONTd:HND	5	vt1 (2), vt2 (3)	2	0	4	0	4	0
Diarrheic calves
O4:HND	1	vt2 (1)	0	0	0	1	0	0
O5:HNM	1	vt1 (1)	0	0	0	0	1	1
O23:HND	1	vt1 + vt2 (1)	0	0	1	0	1	0
O26:HNM	2	vt1 (2)	0	0	0	0	2	2
O26:H11	3	vt1 (3)	0	0	0	1	2	3
O39:HND	1	vt1 (1)	0	0	0	0	0	0
O91:HND	2	vt2 (2)	0	0	0	0	1	0
O113:HND	1	vt2 (1)	0	0	0	1	0	0
O128:H16	1	vt1 (1)	0	0	0	0	1	1
O128:HND	1	vt1 (1)	0	0	1	0	1	0
O171:HND	1	vt2 (1)	0	0	0	0	0	0
ONT:HND	1	vt1 (1)	0	0	0	1	0	0

^aData for the serogrouping/serotyping, vt genotype, and possession of saa, ehxA, and eae genes were reported from previous studies (6, 10, 11, 13).

^bND, not determined.

^cNM, nonmotile.

^dNT, nontypeable.