Salmonella Genomics in Public Health and Food Safety

Area of Science:

• Microbiology
• Genomics
• Environmental Science

Background:

• Salmonella enterica, with over 2,600 serovars, is an intracellular pathogen impacting mammals, birds, and reptiles.
• Salmonella is an adaptable environmental microbe, persisting in soil, water, and plants, including produce.

Purpose of the Study:

• To explore the evolution and diversity of nontyphoidal Salmonella serovars (NTS) in environmental niches.
• To highlight the impact of the genomics era on Salmonella research and diagnostics.

Main Methods:

• Utilizing the vast public database of over 340,000 Salmonella genomes.
• Employing whole-genome sequencing (WGS) for strain detection, differentiation, and characterization.
• Integrating genomic analysis with functional and phenotypic studies.

Main Results:

• WGS data provide a global view of Salmonella's movement from environmental reservoirs to hosts.
• Genomic analysis enables efficient characterization of phenotypes like drug resistance, serovar, and virulence determinants.
• Insights into adaptive changes enabling NTS persistence in diverse environments are emerging.

Conclusions:

• The genomics era has revolutionized the study and detection of Salmonella enterica.
• Whole-genome sequencing is a powerful tool for understanding Salmonella's environmental adaptation and epidemiology.
• Genomic and functional studies are crucial for uncovering mechanisms of NTS environmental persistence.