Toxin production by Campylobacter spp

T M Wassenaar1

  • 1Institute of Medical Microbiology and Hygiene, University of Mainz, Germany. wassen@mzdmza.zdv.uni-mainz.de

Insights

Campylobacter jejuni toxins remain controversial. This review compiles known exotoxins, analyzes their properties and clinical relevance, and suggests future research directions for understanding their role in human disease.

Area of Science:

  • Microbiology and Infectious Diseases
  • Bacterial Pathogenesis
  • Toxinology

Background:

  • Campylobacter jejuni is a significant human pathogen.
  • The role of bacterial toxins in C. jejuni pathogenesis is debated.
  • Existing literature on C. jejuni toxins is often anecdotal, hindering consensus.

Purpose of the Study:

  • To compile and critically review all described Campylobacter exotoxins.
  • To compare the properties and reported effects of these toxins.
  • To summarize evidence from animal models and clinical data regarding toxin relevance.

Main Methods:

  • Systematic literature review of Campylobacter exotoxins.
  • Categorization of toxins into enterotoxins and cytotoxins based on biochemical properties.
  • Comparative analysis of Campylobacter toxins with those from other species.

Main Results:

  • A comprehensive catalog of C. jejuni exotoxins and related species is presented.
  • Reported properties and effects of various toxins are compared.
  • Evidence from animal and clinical studies is synthesized to assess toxin significance.

Conclusions:

  • The relevance of proteinaceous exotoxins in C. jejuni-induced disease requires further unbiased investigation.
  • This review provides a foundation for a clearer understanding of Campylobacter toxinology.
  • Future research should focus on defined areas to resolve current ambiguities in toxin function.

Related Concept Videos

Bacterial Phylum Actinobacteria01:30

Bacterial Phylum Actinobacteria

Coryneform bacteria are gram-positive, aerobic, nonmotile rods that exhibit irregular, club-shaped, or V-shaped arrangements. Their V-shape results from snapping division, where the inner cell wall layer forms the cross-wall, while the outer layer remains intact until it ruptures on one side, causing the daughter cells to bend away.The primary genera are Corynebacterium and Arthrobacter. Corynebacterium includes diverse species, ranging from saprophytes to pathogens like Corynebacterium...
Production of Antibiotics01:27

Production of Antibiotics

Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...
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...
Botulism01:22

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...
Diphtheria01:28

Diphtheria

Diphtheria is an acute, toxin-mediated infectious disease that primarily affects the upper respiratory tract. It is caused by Corynebacterium diphtheriae, a Gram-positive, pleomorphic rod that lacks spore-forming capability and exhibits a characteristic club-shaped morphology under microscopic examination. While C. diphtheriae can asymptomatically colonize mucosal surfaces, clinical disease manifests only when the bacterial strain is lysogenized by a specific β-corynephage. This phage...
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...