Virulence and other phenotypic characteristics of urinary isolates of cysteine-requiring Escherichia coli.

Abstract excerpt

Urinary isolates of cysteine-requiring Escherichia coli were found to be generally lacking in virulence factors commonly associated with uropathogenic strains. The proportion of auxotrophic strains showing type-1 fimbriation, haemolysin production, motility and sensitivity to normal human serum was significantly less than that of a comparable number of urinary isolates of prototrophic E. coli, although the...

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