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Related Concept Videos

Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
Bacterial Gastroenteritis01:18

Bacterial Gastroenteritis

Bacterial gastroenteritis, characterized by diarrhea, abdominal cramps, and vomiting, is often caused by ingestion of contaminated food or water and is frequently associated with pathogenic Escherichia coli strains. These microbes exploit two principal mechanisms to inflict disease.Shiga toxin–producing E. coli, also referred to as STEC—notably O157:H7—release Shiga toxins that target ribosomes, blocking protein synthesis. The B subunit of the toxin binds the host glycolipid receptor...
Applications of Molecular Taxonomy01:20

Applications of Molecular Taxonomy

Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...

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Related Experiment Video

Updated: Jun 20, 2026

Multi-locus Variable-number Tandem-repeat Analysis of the Fish-pathogenic Bacterium Yersinia ruckeri by Multiplex PCR and Capillary Electrophoresis
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Multi-locus Variable-number Tandem-repeat Analysis of the Fish-pathogenic Bacterium Yersinia ruckeri by Multiplex PCR and Capillary Electrophoresis

Published on: June 17, 2019

Multi-locus variable number tandem repeat analysis for Escherichia coli causing extraintestinal infections.

Amee R Manges1, Patricia A Tellis, Caroline Vincent

  • 1Department of Epidemiology, Biostatistics and Occupational Health, McGill University, 1020 Pine Avenue West, Montréal, Québec, Canada.

Journal of Microbiological Methods
|September 22, 2009
PubMed
Summary

A new genotyping method for Escherichia coli (E. coli) provides highly accurate identification for public health surveillance. This multi-locus variable number tandem repeat analysis achieves 99.5% discrimination, aiding in tracking non-O157:H7 strains.

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Characterization of a Pathogenic Escherichia coli Strain Derived from Oreochromis spp. Farms Using Whole-Genome Sequencing
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Characterization of a Pathogenic Escherichia coli Strain Derived from Oreochromis spp. Farms Using Whole-Genome Sequencing

Published on: December 23, 2022

Area of Science:

  • Microbiology
  • Genetics
  • Public Health

Background:

  • Accurate identification of Escherichia coli (E. coli) strains is crucial for public health surveillance.
  • Existing methods may lack discriminatory power for non-O157:H7 E. coli strains.

Purpose of the Study:

  • To develop and validate a novel, highly discriminatory genotyping method for E. coli.
  • To improve the ability to track diverse E. coli strains beyond O157:H7 for public health applications.

Main Methods:

  • Development of a multi-locus variable number tandem repeat (MLVA) analysis protocol.
  • Testing the MLVA protocol on a diverse collection of 836 E. coli isolates.

Main Results:

  • The developed MLVA protocol demonstrated a high index of discrimination, reaching 99.5%.
  • The method proved to be reproducible and valid across a wide range of E. coli strains.

Conclusions:

  • The novel MLVA protocol offers a robust and accurate tool for E. coli genotyping.
  • This method enhances public health capabilities for monitoring and controlling E. coli outbreaks caused by non-O157:H7 serotypes.