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Related Concept Videos

Bacterial Toxins01:12

Bacterial Toxins

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...
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...
Dysbiosis of the Gut Microbiota01:18

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...
Determinants of Bacterial Pathogenicity and Virulence01:20

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...
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...

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Related Experiment Video

Updated: Jul 8, 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

Key research issues in Clostridium difficile.

George Zhanel1, Greg Hammond

  • 1Department of Medical Microbiology, Faculty of Medicine, University of Manitoba.

The Canadian Journal of Infectious Diseases & Medical Microbiology = Journal Canadien Des Maladies Infectieuses Et De La Microbiologie Medicale
|December 27, 2007
PubMed
Summary

Clostridium difficile infections pose a significant healthcare challenge. Research priorities include diagnosis, prevention, antibiotic stewardship, and clinical management to combat this emerging pathogen.

Keywords:
Clostridium difficileDiarrheaResearch issues

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

Published on: May 25, 2017

Related Experiment Videos

Last Updated: Jul 8, 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

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:

  • Medical Microbiology
  • Infectious Diseases
  • Public Health

Background:

  • Clostridium difficile is an emerging pathogen causing significant nosocomial infections, specifically C. difficile-associated diarrhea.
  • Controlling C. difficile infections is challenging due to antimicrobial resistance, environmental contamination, and host factors.
  • Existing knowledge gaps necessitate further research into effective management strategies.

Purpose of the Study:

  • To summarize key research issues concerning Clostridium difficile infections in Canada.
  • To provide a platform for discussion on C. difficile and its health impact.
  • To identify critical research areas and explore funding and collaboration opportunities.

Main Methods:

  • A national symposium, the Clostridium difficile Symposium on Emerging Issues and Research, was convened.
  • Key research issues were identified and discussed across four major themes.
  • The report synthesizes findings from the symposium discussions.

Main Results:

  • Identified key research priorities in diagnosis and surveillance of C. difficile infections.
  • Highlighted critical areas in infection prevention and control strategies.
  • Emphasized the importance of antibiotic stewardship and clinical management.

Conclusions:

  • Further research is crucial to address the challenges posed by Clostridium difficile.
  • Collaboration and funding are essential to advance C. difficile research in Canada.
  • A comprehensive approach encompassing diagnosis, prevention, stewardship, and management is needed.