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Updated: Jun 4, 2026
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Detecting Cortex Fragments During Bacterial Spore Germination
Published on: June 25, 2016
Clostridial spore germination versus bacilli: genome mining and current insights
Yinghua Xiao1, Christof Francke, Tjakko Abee
1Top Institute Food and Nutrition (TIFN), Nieuwe Kanaal 9A, 6709 PA, Wageningen, The Netherlands.
Food Microbiology
|February 15, 2011
Summary
Clostridial spore germination is less understood than Bacillus. Genome mining reveals fewer germinant receptor operons and distinct cortex-lytic enzymes in clostridia, impacting food safety.
Area of Science:
- Microbiology
- Food Science
- Genomics
Background:
- Bacterial endospores (Bacilli, Clostridia) are heat-resistant and ubiquitous food contaminants.
- Spore germination can cause food spoilage and foodborne illness.
- Clostridial spore germination mechanisms are poorly understood compared to Bacillus.
Purpose of the Study:
- To investigate clostridial spore germination genes using a genome mining approach.
- To compare germination-related genes in Clostridium and Bacillus species.
- To develop an in silico model for clostridial spore germination.
Main Methods:
- Genome mining of 24 Clostridium and 12 Bacillus genomes.
- Analysis of known and putative germination-related genes and homologues.
- Construction of an in silico germination model for clostridia.
Main Results:
- Clostridia possess fewer germinant receptor (ger) operons than bacilli.
- Predicted cortex-lytic enzymes in Clostridium differ from those in Bacillus.
- An in silico model was developed and linked to experimental data for Clostridium perfringens.
Conclusions:
- Significant differences exist in spore germination gene content between clostridia and bacilli.
- Distinct germination pathways in clostridia warrant further investigation for food safety.
- Comparative genomics provides insights into spore germination mechanisms.
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