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

Figure 4

(a) Ladder size: 1000 bp, line 4, 6, and 8 cdt1 positive (411 bp); lines 1–9 uidA positive (102 bp). (b) Ladder size: 1000 bp, line 8 cdt2 (556 bp). (c) Ladder size: 1000 bp, line 2, 4, and 5 cdt3 (555 bp). (d) Ladder size: 1000 bp, line 9, cdt4 positive (350 bp).

(a)

(b)

(c)

(d)