Identification of Campylobacter jejuni multilocus sequence type ST-21 clonal complex by single-nucleotide...

Area of Science:

• Microbiology
• Epidemiology
• Genetics

Background:

• Campylobacter jejuni is a leading cause of bacterial gastroenteritis globally.
• The ST-21 lineage is a major epidemiological group of C. jejuni.
• Current methods like multilocus sequence typing (MLST) can be time-consuming for large-scale surveillance.

Purpose of the Study:

• To identify conserved single-nucleotide polymorphisms (SNPs) specific to the C. jejuni ST-21 lineage.
• To develop a rapid method for profiling C. jejuni strains belonging to the ST-21 clonal complex.
• To provide a complementary tool for epidemiological investigations of C. jejuni.

Main Methods:

• Analysis of the Campylobacter jejuni MLST database to identify conserved SNPs within the ST-21 lineage.
• Design and implementation of allelic discrimination assays for targeted SNP detection.
• Validation of the SNP-based method for rapid strain profiling.

Main Results:

• Identification of specific conserved SNPs that accurately characterize the ST-21 allelic profile.
• Development of a rapid and reliable assay for detecting these SNPs.
• Demonstration that the SNP assay enables efficient profiling of C. jejuni strains within the ST-21 clonal complex.

Conclusions:

• Conserved SNPs provide a valuable tool for rapid identification of the C. jejuni ST-21 lineage.
• This SNP-based method is a practical complement to traditional MLST for epidemiological surveillance.
• The developed assay facilitates faster and more targeted investigations of C. jejuni outbreaks and transmission.