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 4

The distribution of toxin genes in CDT- and CNF-positive 156 ExPEC isolates.

Virulence factor	cnf1	cnf2	cnf3	cnf1-cnf3	cdt1	cdt2	cdt3	cdt4	cdt1-cdt4	cnf1-cdt1
Total (n = 156)	78	12	20	6	20	4	4	4	4	4
n/total	78/156	12/156	20/156	6/156	20/156	4/156	4/156	4/156	4/156	4/156
%	50	7.6	12.8	3.8	12.8	2.5	2.5	2.5	2.5	2.5