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Botulism

Botulism is a life-threatening neuroparalytic condition caused by botulinum neurotoxin, which is produced by the bacterium Clostridium botulinum, a Gram-positive, spore-forming, obligate anaerobe.In adults, the toxin enters the body in different ways: in foodborne botulism, the preformed toxin is absorbed in the intestine. In wound botulism, spores grow in injured tissue and release the toxin into the blood. Infant botulism differs mechanistically from adult forms. In infants, botulism commonly...
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Tetanus is a life-threatening neurological disorder characterized by persistent muscle contractions and spastic paralysis. It is caused by Clostridium tetani, a motile, Gram-positive, rod-shaped, obligate anaerobe. These bacteria produce terminal endospores, giving them a distinctive “lollipop” or “tennis-racket” appearance. They thrive in anaerobic environments, such as those found in deep puncture wounds.Once introduced into the body, the spores germinate into vegetative cells. These cells...
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Endospores are specialized, dormant cells primarily formed by Gram-positive bacteria, including Bacillus and Clostridium, enabling survival under extreme environmental conditions. Due to their unique composition and formation process, these structures are highly resistant to physical and chemical insults, such as extreme heat, ultraviolet and ionizing radiation, desiccation, and toxic chemicals. Rare instances of endospore-like structures have also been observed in some Gram-negative bacteria,...
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Anthrax is a zoonotic disease caused by Bacillus anthracis, a Gram-positive, spore-forming bacterium. It primarily affects herbivorous animals but can be transmitted to humans through skin contact, ingestion, or inhalation of spores.Cutaneous anthrax, the most common form, typically results from direct contact with bacterial spores through skin abrasions and is generally less severe. Gastrointestinal anthrax results from eating undercooked or contaminated meat. It affects the mouth, throat, or...
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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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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

Clostridium perfringens vaccines.

Richard W Titball1

  • 1School of Biosciences, Geoffrey Pope Building, University of Exeter, Devon EX4 4QD, United Kingdom. R.W.Titball@exeter.ac.uk

Vaccine
|October 20, 2009
PubMed
Summary
This summary is machine-generated.

Clostridium perfringens spores and toxins are potential biowarfare agents causing gas gangrene. Current vaccines are unavailable for humans, but animal vaccine development shows promise for future human protection.

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Area of Science:

  • Microbiology
  • Immunology
  • Biodefense

Background:

  • Clostridium perfringens spores and toxins are recognized as potential biological warfare agents.
  • Spore dissemination can lead to deep tissue infection and gas gangrene.
  • Epsilon-toxin, a C. perfringens toxin, is a CDC select agent of significant concern.

Purpose of the Study:

  • To address the lack of licensed human vaccines against C. perfringens-induced gas gangrene and epsilon-toxin.
  • To explore the potential of animal vaccine candidates for human application.

Main Methods:

  • Review of existing literature on C. perfringens as a biowarfare agent.
  • Assessment of current vaccine development strategies for C. perfringens and its toxins.
  • Evaluation of the applicability of animal vaccine models for human use.

Main Results:

  • No licensed human vaccines currently exist for protection against gas gangrene or C. perfringens epsilon-toxin.
  • Vaccines developed for animal use are under investigation.
  • These animal vaccines demonstrate potential for future human vaccination.

Conclusions:

  • There is a critical need for effective human vaccines against C. perfringens biothreats.
  • Ongoing research into animal vaccines offers a promising avenue for developing human countermeasures.
  • Further development is required to translate animal vaccine success to human applications.