Related Experiment Video
Updated: Mar 28, 2026

Characterization of a Pathogenic Escherichia coli Strain Derived from Oreochromis spp. Farms Using Whole-Genome Sequencing
Published on: December 23, 2022
Virulence Genes in Expanded-Spectrum-Cephalosporin-Resistant and -Susceptible Escherichia coli Isolates from Treated
S Baron1, S Delannoy2, S Bougeard1
1ANSES, Ploufragan Laboratory, Ploufragan, France Université Européenne de Bretagne, Rennes, France.
Abstract:
This study investigated antimicrobial resistance, screened for the presence of virulence genes involved in intestinal infections, and determined phylogenetic groups of Escherichia coli isolates from untreated poultry and poultry treated with ceftiofur, an expanded-spectrum cephalosporin. Results show that none of the 76 isolates appeared to be Shiga toxin-producing E. coli or enteropathogenic E. coli. All isolates were negative for the major virulence factors/toxins tested (ehxA, cdt, heat-stable enterotoxin [ST], and heat-labile enterotoxin [LT]). The few virulence genes harbored in isolates generally did not correlate with isolate antimicrobial resistance or treatment status. However, some of the virulence genes were significantly associated with certain phylogenetic groups.
More Related Videos
06:30A Non-Coding Small RNA MicC Contributes to Virulence in Outer Membrane Proteins in Salmonella Enteritidis
Published on: January 27, 2021
09:21A Ligated Intestinal Loop Model in Anesthetized Specific Pathogen Free Chickens to Study Clostridium Perfringens Virulence
Published on: October 11, 2018
Related Concept Videos
Bacterial Gastroenteritis
Clinical Significance of Antibiotic Resistance
Mechanism of Antibiotic Resistance in MRSA
Stringent Response in E. coli
Development of Antibiotic Resistance
Gene Regulation in Microbial Communities: Quorum Sensing