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  • microcin (cas 1403-96-9)s and urovirulence in Escherichia coli
  • Add time:09/05/2019         Source:sciencedirect.com

    Urinary tract infections are among the most common infectious diseases encountered in humans and Escherichia coli is their leading etiologic agent. Uropathogenic E. coli encompasses a group of bacteria possessing a variable virulence gene assortment. It is generally agreed that many urovirulence factors remain to be discovered and that this information is required to gain knowledge on the pathogenic processes underlying the different clinical presentations of urinary tract infections. The production of higher-molecular-mass microcins, a group of ribosomally-synthesized peptide antibiotics comprising microcins H47, I47, E492, M and ColV, has been proposed as a virulence trait of some uropathogenic E. coli. To study this possibility, clones producing any of these microcins were selected from a collection of 160 Gram-negative clinical isolates from urine cultures and their virulence profile was analyzed. The study consisted in surveying genetic loci known to be relevant to urinary tract infection caused by E. coli. Depending on the type of microcin produced, different virulence patterns were observed which seemed to be determined by the degree of compatibility between virulence and microcin loci. In conclusion, results pointed to a relationship between higher-molecular-mass microcins and urovirulence.

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