Colicin V production by clinical isolates of Escherichia coli

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Abstract
Strains of E. coli isolated from random fecal samples, urines of hospitalized and nonhospitalized patients who had urinary tract infections and blood of patients with septicemia were examined for colicin V production. The percentage of ColV+ strains isolated from blood (31.6%) or from urines of hospitalized patients with urinary tract infections (26.2%) was significantly greater (P < 0.01) than the percentage isolated from feces (13.6%). The colicin V immunity determinant of ColV,I-K94, conferred immunity to 26% of the type V colicins produced by clinical isolates. Of the ColV+ strains studied, 63.6% produced at least 1 other type of colicin.

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