Occurrence and genetic association of selected virulence factors in clinical Escherichia coli isolates.
2002
Occurrence ofcnf1+ E. coli pathogenic strains among extraintestinalE. coli isolates was evaluated to explain an impact of cytotoxic necrotizing factor type 1 (CNF1) in human infections. A total of 120E. coli isolates were characterized for presence of virulence factorscnf1- andpap- specific sequences by PCR, and the production of α-hemolysin using blood agar-plate test. Different association patterns among the detected virulence factors were obtained by comparison of various groups of clinicalE. coli isolates. These differences probably reflect a potential impact of CNF1 in the colonization of vaginal environment.
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