Large-scale comparative genomics identifies novel diagnostic markers in six clinically important Enterococcus species

Area of Science:

• Microbiology
• Genomics
• Molecular Diagnostics

Background:

• Enterococcus species, including E. faecalis and E. faecium, are significant causes of hospital-acquired infections.
• Emerging resistance and less common species necessitate improved identification methods.

Purpose of the Study:

• To identify reliable genus- and species-specific genetic markers for Enterococcus.
• To develop accurate diagnostic tools for Enterococcus identification and surveillance.

Main Methods:

• Large-scale comparative genomic analysis of over 35,000 Enterococcus and 1.4 million non-Enterococcus genomes.
• Identification of genus-specific (rpmC) and species-specific marker genes.
• Development and validation of duplex and multiplex PCR assays.

Main Results:

• The rpmC gene was identified as a genus-specific marker for Enterococcus.
• Six species-specific markers were discovered with high intra-species similarity and low inter-species similarity.
• PCR assays demonstrated 100% accuracy in identifying 150 clinical Enterococcus isolates and 54 non-Enterococcus strains.

Conclusions:

• Large-scale omics approaches can discover robust diagnostic markers.
• The identified markers provide accurate and reliable tools for Enterococcus species identification.
• These tools are valuable for clinical diagnostics and epidemiological surveillance of Enterococcus infections.