Table 3.

Virulence markers detected in the 79 colistin-resistant E. coli isolates.

Virulence marker		Number of positive isolates	% of positive isolates
O antigens	O141	21	27
	O149	12	15
	O139	8	10
	O8(abc)	3	4
F antigens	F18	29	37
	F4	27	34
	F5	0	0
	F41	0	0
Toxins	hlyA	61	77
	estII	44	56
	astA	41	52
	elt	32	40
	estI	31	39
	stx2e	27	34
	ehxA	0	0
Adhesins	iha	37	47
	orfA	30	38
	orfB	29	37
	paa	27	34
	lpfA-O113	17	22
	eae	1	1
	lpfA-O157	0	0
	saa	0	0
	efa1	0	0
	bfpA	0	0
	aggR	0	0
Iron acquisition	fyuA	8	10
	irp2	8	10
Others	terE	67	85
	ecs1763	48	61
	ureD	37	47
	epeA	0	0
	ecf1	0	0
	nleB	0	0
	ipaH	0	0