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Antimicrobial efficacy and prevalence of colicinogenic E. coli in faecal matter of human, cow and sheep.

Int J Antimicrob Agents

January 2021

Centre of Biotechnology and Microbiology, University of Peshawar, Pakistan. Electronic address:

Colicinogenic Escherichia coli in the human or animal gut prevent pathogen accumulation, thereby protecting against severe gut infections. This ability of commensal human and animal E. coli to restrain Gram-negative pathogens was evaluated invitro.

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Plasmid DNA of six Escherichia fergusonii colicinogenic strains (three producers of colicin E1, two of Ib and one of Ia) was isolated and the colicin-encoding regions of the corresponding Col plasmids were sequenced. Two new variants of colicin E1, one of colicin Ib, and one of colicin Ia were identified as well as new variants of the colicin E1 and colicin Ib immunity proteins and the colicin E1 lysis polypeptide. The recombinant Escherichia coli producer harboring pColE1 from E.

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Colicins--exocellular lethal proteins of Escherichia coli.

Folia Microbiol (Praha)

March 1999

Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.

Colicins are toxic exoproteins produced by bacteria of colicinogenic strains of Escherichia coli and some related species of Enterobacteriaceae, during the growth of their cultures. They inhibit sensitive bacteria of the same family. About 35% E.

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Twenty-seven diarrheagenic Escherichia coli (DEC) strains from five closely related, genetically distinct clones (DEC 3, 4, 8, 9, and 10), representing serotypes commonly associated with Shiga-like toxin production, i.e., O15:H-, O26:(H11, H-), O111:(H8, H11, H-), and O157:H7, were evaluated for colicinogeny on Luria agar or Luria agar containing 0.

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Production of toxins (enterotoxins, verotoxins, and necrotoxins) and colicins by Escherichia coli strains isolated from septicemic and healthy chickens: relationship with in vivo pathogenicity.

J Clin Microbiol

November 1997

Departamento de Microbiología y Parasitología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo, Spain.

Since the mechanism of virulence of Escherichia coli strains pathogenic to birds is not fully understood, the prevalence of toxic factors produced by E. coli strains pathogenic to other animals was investigated. A total of 625 E.

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