The Distribution of Cytotoxic Necrotizing Factors (CNF-1, CNF-2, CNF-3) and Cytolethal Distending Toxins (CDT-1, CDT-2, CDT-3, CDT-4) in Escherichia coli Isolates Isolated from Extraintestinal Infections and the Determination of their Phylogenetic Relationship by PFGE

Table 6

The distribution of 156 ExPEC isolates virulence genes by phylogenetic group and clinical origin.

Virulence genes	No. (%) of virulence isolates (n = 156)		No. (%) of isolates
	Urinary/others (n = 121)/(n = 35)		Group A n = 8 (5, 1)		Group B1 n = 5 (3, 2)		Group B2 n = 95 (60)		Group D n = 48 (30)
			Urinary/others		Urinary/others		Urinary/others		Urinary/others
cnf1	68 (56)	10 (29)	0	0	0	3 (60)	38 (39)	3 (4)	30 (62)	4 (8)
cnf2	10 (8)	2 (6)	3 (37)	0	0	0	7 (7)	2 (2)	0	0
cnf3	16 (13)	4 (11)	2 (25)	2 (25)	0	0	12 (13)	2 (2)	2 (4)	0
cdt1	12 (10)	8 (23)	0	1 (13)	0	0	12 (13)	7 (7)	0	0
cdt2	2 (2)	2 (6)	0	0	0	0	0	0	2 (4)	2 (4)
cdt3	2 (2)	2 (6)	0	0	0	0	0	0	2 (4)	2 (4)
cdt4	2 (2)	2 (6)	0	0	0	2 (40)	2 (2)	0	0	0
cnf1–cnf3	5 (4)	1 (3)	0	0	0	0	5 (5)	1	0	0
cdt1–cdt4	1 (1)	3 (9)	0	0	0	0	1 (5)	3 (3)	0	0
cnf1-cdt1	2 (2)	2 (6)	0	0	0	0	0	0	2 (4)	2 (4)