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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...
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...
Bacterial Meningitis I: Introduction01:22

Bacterial Meningitis I: Introduction

Bacterial meningitis is a severe, life-threatening inflammation of the meninges, particularly the pia mater and arachnoid mater, affecting the subarachnoid space, ventricles, and cerebrospinal fluid (CSF). If untreated, it can lead to significant neurological complications or death.Causative AgentsCommon pathogens vary with age and immune status. In adults, major organisms include Streptococcus pneumoniae, Neisseria meningitidis, and Haemophilus influenzae. Streptococcus agalactiae (group B...
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...
Bacterial Phylum Spirochaetes01:30

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Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased by a...
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Reservoir of Infection

Infectious diseases arise from intricate interactions between pathogens and their reservoirs. A reservoir of infection refers to the natural habitat where a pathogen lives, grows, and multiplies, serving as a continual source of infection. Reservoirs are broadly classified as either living or nonliving, and each plays a unique role in disease transmission, significantly influencing public health interventions and control strategies.Humans act as reservoirs for a wide array of pathogens,...

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Updated: May 27, 2026

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

Life-threatening clostridial infections.

Dennis L Stevens1, Michael J Aldape, Amy E Bryant

  • 1Research and Development, Veterans Affairs Medical Center, Boise, ID 83702, USA.

Anaerobe
|November 29, 2011
PubMed
Summary

Clostridium species cause severe soft tissue infections like gas gangrene, often linked to trauma or specific medical conditions. New research explores novel therapeutic targets to combat these dangerous exotoxin-producing bacteria.

Area of Science:

  • Infectious Diseases
  • Microbiology
  • Toxicology

Background:

  • Life-threatening soft tissue infections caused by Clostridium species, including gas gangrene, have a long history in medical literature.
  • Key species like Clostridium perfringens, septicum, and histolyticum are primary causes of trauma-associated gas gangrene, with incidence rising during mass casualty events.
  • Recent trends show increased spontaneous gas gangrene (Clostridium septicum) linked to gastrointestinal issues and neutropenia, and toxic shock-like syndrome (Clostridium sordellii) associated with specific medical procedures and substance use.

Purpose of the Study:

  • To review the pathogenesis and clinical significance of Clostridium-associated soft tissue infections.
  • To highlight the role of potent exotoxins in the disease process.
  • To identify emerging therapeutic targets for novel treatment strategies.

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Enrichment and Detection of Clostridium perfringens Toxinotypes in Retail Food Samples
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Enrichment and Detection of Clostridium perfringens Toxinotypes in Retail Food Samples

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

Published on: December 10, 2016

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Last Updated: May 27, 2026

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

Enrichment and Detection of Clostridium perfringens Toxinotypes in Retail Food Samples
08:00

Enrichment and Detection of Clostridium perfringens Toxinotypes in Retail Food Samples

Published on: October 18, 2019

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

Main Methods:

  • Literature review of historical and recent studies on Clostridium species infections.
  • Analysis of clinical presentations, associated conditions, and epidemiological trends.
  • Examination of the role of exotoxins in pathogenesis.

Main Results:

  • Clostridium species infections, particularly gas gangrene, remain a significant clinical challenge, exacerbated by trauma and mass casualty events.
  • Emerging patterns include spontaneous gas gangrene and Clostridium sordellii-associated toxic shock-like syndrome.
  • The pathogenesis is primarily driven by potent exotoxin production.

Conclusions:

  • Effective management of these infections is complex and requires strategies targeting toxin production and action.
  • Novel therapeutic approaches focusing on inhibiting toxins or their interaction with the immune system are needed.
  • Recent research has identified promising new targets for future therapies against Clostridium-induced infections.