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Related Concept Videos

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...
Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
Colonisation of Pathogens01:25

Colonisation of Pathogens

Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
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Dysbiosis of the Gut Microbiota

The human gut microbiome includes a diverse array of microbial species, including beneficial commensals and opportunistic pathogens, which interact to support host health. These microbes contribute to essential functions such as nutrient metabolism, immune system modulation, and maintenance of intestinal barrier integrity. However, disruptions to this equilibrium—referred to as dysbiosis—can have widespread physiological consequences.Dysbiosis is often characterized by reduced microbial...
Bacterial Toxins01:12

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Bacterial toxins are sophisticated virulence factors that enable pathogenic bacteria to interact with, invade, and damage host tissues. These toxins fall broadly into two types: protein exotoxins, which are secreted into the environment and target specific host receptors, and lipopolysaccharide endotoxins, which are structural components of the bacterial outer membrane released primarily during bacterial lysis or membrane shedding. Exotoxins generally act more selectively, binding to cell...
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Determinants of Bacterial Pathogenicity and Virulence

Pathogenic bacteria employ a variety of strategies to establish infections, including the secretion of extracellular enzymes that act as potent virulence factors. These enzymes facilitate bacterial colonization of host tissues and help evade immune surveillance. By targeting structural components of host tissues and interfering with immune mechanisms, these enzymes play a pivotal role in disease progression.Extracellular Enzymes Facilitating Tissue Invasion: Several bacterial pathogens secrete...

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Related Experiment Video

Updated: Jun 11, 2026

Cefoperazone-treated Mouse Model of Clinically-relevant Clostridium difficile Strain R20291
06:51

Cefoperazone-treated Mouse Model of Clinically-relevant Clostridium difficile Strain R20291

Published on: December 10, 2016

Clostridium difficile: no longer an enigmatic pathogen?

Adam P Roberts1, Peter Mullany

  • 1Division of Microbial Diseases, University College, London Eastman Dental Institute, 256 Gray's Inn Road, London, UK. a.roberts@eastman.ucl.ac.uk

Methods in Molecular Biology (Clifton, N.J.)
|July 3, 2010
PubMed
Summary
This summary is machine-generated.

Investigating the molecular genetics of Clostridium difficile is crucial due to its increasing clinical importance. New genomic data and genetic tools enable researchers to finally understand its pathogenicity.

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A Protocol to Characterize the Morphological Changes of Clostridium difficile in Response to Antibiotic Treatment

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Last Updated: Jun 11, 2026

Cefoperazone-treated Mouse Model of Clinically-relevant Clostridium difficile Strain R20291
06:51

Cefoperazone-treated Mouse Model of Clinically-relevant Clostridium difficile Strain R20291

Published on: December 10, 2016

Culturing and Maintaining Clostridium difficile in an Anaerobic Environment
11:13

Culturing and Maintaining Clostridium difficile in an Anaerobic Environment

Published on: September 14, 2013

A Protocol to Characterize the Morphological Changes of Clostridium difficile in Response to Antibiotic Treatment
12:58

A Protocol to Characterize the Morphological Changes of Clostridium difficile in Response to Antibiotic Treatment

Published on: May 25, 2017

Area of Science:

  • Microbiology
  • Molecular Genetics
  • Infectious Diseases

Background:

  • Clostridium difficile is a bacterium of increasing clinical significance.
  • Recent advancements include extensive genome sequencing and molecular epidemiology.
  • This has led to a better understanding of the organism's genetic makeup.

Purpose of the Study:

  • To investigate the molecular genetics of Clostridium difficile.
  • To leverage new genomic data and genetic manipulation tools.
  • To address fundamental questions regarding the bacterium's biology and pathogenicity.

Main Methods:

  • Genome sequencing of multiple Clostridium difficile strains.
  • Development of genetic manipulation tools for the organism.
  • Application of molecular techniques to study pathogenicity.

Main Results:

  • Enhanced understanding of Clostridium difficile genetic content and epidemiology.
  • Availability of tools for genetic manipulation.
  • Readiness to address key biological and pathogenic questions.

Conclusions:

  • A new era of Clostridium difficile research is enabled by current tools and knowledge.
  • It is now possible to empirically determine the mechanisms of disease causation.
  • Fulfillment of Koch's molecular postulates for Clostridium difficile is within reach.