TABLE 2.

Complex STEC serotypes isolated in longitudinal flock studies

Serotypea	Previously reportedb	No. of isolates (no. of sheep infected)c	Virulence factor profiled				No. of infected sheep
			stx1	stx2	eae	ehxA	Ewes	Lambs
								<6 wk old	Preweaning	Postweaning
O5:H−	Yes	29 (21)	+	+		+	9	3	6	3
O8:H19	Yes	1 (1)	+	+		+	1
O21:H21	Yes	1 (1)	+	+		+		1
O26:H−	Yes	2 (2)	+		+	+		2
O26:H11	Yes	3 (3)	+		+	+		3
O26:H21	Yes	1 (1)	+	+	+			1
O75:H−	Yes	2 (2)	+	+		+			2
O75:H8	Yes	26 (20)	+	+		+	3	5	8	4
O75:H40	Yes	3 (2)	+	+		+		1	1
O77:H−	No	1 (1)	+			+		1
O77∼H4	Yes	3 (2)	+			+			2
O91:H−	Yes	19 (17)	+	+		+	6	3	6	2
O103:H38	No	2 (2)	+	+		+		1
			+		+	+		1
O106:H18	No	1 (1)	+	+		+		1
O107:H−	No	1 (1)	+	+		+				1
O107/O117:H−	No	1 (1)	+			+			1
O110:H28	No	1 (1)	+	+		+				1
O117:H21	No	1 (1)	+			+	1
O121:H2	No	1 (1)	+	+		+			1
O123:H−	Yes	35 (26)	+	+		+	6	8	6	6
O123:H11	No	1 (1)	+	+		+		1
O128:H−	Yes	5 (3)	+	+		+	1		1
			+	+	+	+				1
O128:H2	Yes	40 (34)	+	+		+	3	10	14	7
O128:H2/H8	No	2 (2)	+	+		+	2
O128:H8/H12	No	1 (1)	+	+		+	1
O128:HR	No	1 (1)	+			+		1
O128:Hnt	No	1 (1)	+	+		+	1
O149:H2	No	2 (2)	+	+		+			1
O153:H−	Yes	5 (3)	+	+		+		2
O153:H8	Yes	1 (1)	+	+		+	1
O153:H25	Yes	3 (3)	+			+		2
O154:HR	No	1 (1)	+			+		1
O157:H−	Yes	1 (1)		+	+	+				1
Ont:H−	Yes	12 (8)	+			+	2	5
			+	+	+	+			1
Ont:H4	Yes	4 (4)	+			+		2	1	1
Ont:H5/H51	No	1 (1)	+	+		+			1
Ont:H11	Yes	2 (2)		+		+		1
			+	+		+	1
Ont:H14	Yes	1 (1)	+	+		+	1
Ont:H19	Yes	2 (2)	+	+		+	1		1
Ont:H21	Yes	1 (1)	+	+		+				1
Ont:H49	Yes	2 (2)	+	+		+	1		1
Ont:HR	Yes	10 (9)	+			+	2	7
OR:H−	Yes	2 (2)	+			+		1
			+	+		+		1
OR:H2	Yes	7 (5)	+	+		+	2	2	1
OR:H4	Yes	1 (1)	+	+		+	1
OR:H11	Yes	1 (1)	+		+	+		1
OR:HR	No	1 (1)	+			+		1
O174:H2	Yes	1 (1)	+	+		+			1
O174:HR	No	1 (1)	+			+		1

^aOnt, O nontypeable; OR, O rough.

^bNo, not previously reported (http://www.microbionet.com.au/frames/feature/vtec/brief01.html).

^cNumbers in brackets are the number of sheep excreting the serotype.

^d+, gene detected by PCR.