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  • Title: Virulence factors of Escherichia coli in urinary isolates.
    Author: Vidotto MC, Furlaneto MC, Perugini MR.
    Journal: Braz J Med Biol Res; 1991; 24(4):365-73. PubMed ID: 1823249.
    Abstract:
    1. Escherichia coli strains isolated from 100 urine samples taken from patients with urinary tract infections (UTI) and from 20 normal fecal (NF) samples were examined for serum resistance, mannose-resistant hemagglutination of human erythrocytes (MRHA) and for production of aerobactin, hemolysin and colicin. 2. Among the UTI E. coli strains, 79% produced aerobactin, 69% showed serum resistance, 44% produced MRHA, 32% were beta-hemolytic and 22% were colicinogenic. A greater proportion of UTI E. coli strains produced aerobactin, colicin V, beta-hemolysis and MRHA when compared to NF strains. Production of MR hemagglutinins was significantly correlated with that of aerobactin and hemolysin. 3. These results suggest that the presence of aerobactin may be a significant etiological factor in UTI, and that the production of MR adhesins and of hemolysin also might contribute to the virulence of these strains.
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