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Enrichment and Detection of Clostridium perfringens Toxinotypes in Retail Food Samples
Published on: October 18, 2019
Toxin production by Campylobacter spp
1Institute of Medical Microbiology and Hygiene, University of Mainz, Germany. wassen@mzdmza.zdv.uni-mainz.de
Abstract:
Of all the virulence factors that were proposed for Campylobacter jejuni and related species to cause disease in humans, the discovery of toxin production was the most promising but led to a rather confusing and even disappointing stream of data. The discussion of whether proteinaceous exotoxins are relevant in disease remains open. One important reason for this lack of consensus is the anecdotal nature of the literature reports. To provide a basis for an unbiased opinion, this review compiles all described exotoxins, compares their reported properties, and provides a summary of animal model studies and clinical data. The toxins are divided into enterotoxins and cytotoxins and are sorted according to their biochemical properties. Since many Campylobacter toxins have been compared with toxins of other species, some key examples of the latter are also discussed. Future directions of toxin research that appear promising are defined.
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.
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