Pathogenesis and Detection of Yersinia Species

Yersinia species encompass three principal human pathogens: Yersinia pestis, the agent of plague, and two enteric species, Yersinia enterocolitica and Yersinia pseudotuberculosis, responsible for yersiniosis. Pathogenesis begins with adhesion to host tissues via chromosomally encoded proteins such as invasin and the Ail (attachment-invasion locus) protein. A plasmid-borne type III secretion system delivers effector Yop proteins into host cells to subvert phagocytic uptake and inflammasome activation, allowing extracellular survival in lymphoid tissues. Temperature-dependent regulation of virulence determinants ensures adaptation from environmental reservoirs to mammalian hosts. Detection traditionally relies on selective culture, biochemical identification and serotyping or biotyping, but these approaches suffer from low sensitivity and prolonged turnaround. Molecular methods including conventional and real-time PCR targeting virulence genes (ail, yst) and whole-genome sequencing have revolutionised species identification and strain characterisation. Emerging techniques such as core-genome multilocus sequence typing and CRISPR-based diagnostics promise rapid, high-resolution insights into transmission pathways and antimicrobial resistance profiles. Together, advances in understanding virulence mechanisms and improvements in detection platforms underpin efforts to reduce underascertainment, inform public health interventions and guide clinical management of Yersinia infections on a global scale.

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Pathogenesis and Detection of Yersinia Species publication trend

The graph below shows the total number of articles in pathogenesis and detection of yersinia species across all publications each year (not limited to Nature Index journals).

Technical terms

Type III secretion system (T3SS): A specialised protein complex that injects bacterial effector molecules into host cells to modulate immune responses and promote extracellular survival.

Invasin (Inv): A chromosomal adhesin that binds to host cell integrins to trigger bacterial internalisation into epithelial cells.

Ail: A surface-expressed protein encoded by the attachment and invasion locus that mediates adhesion and resistance to complement-mediated killing.

Real-time PCR: A molecular technique that amplifies and quantifies specific DNA targets in real time, enabling rapid detection of pathogenic organisms.

CgMLST: Core genome multilocus sequence typing, a high-resolution method that compares sequence variation across hundreds to thousands of conserved genes for accurate species identification and strain discrimination.

References

1. Forgotten but not gone: Yersinia infections in England, 1975 to 2020. Eurosurveillance (2023).
2. Evaluation of two real-time PCR methods to detect Yersinia enterocolitica in bivalve molluscs collected in Campania region. Food Research International (2024).
3. Public health implications of Yersinia enterocolitica investigation: an ecological modeling and molecular epidemiology study. Infectious Diseases of Poverty (2023).
4. Genus-wide Yersinia core-genome multilocus sequence typing for species identification and strain characterization. Microbial Genomics (2019).
5. Pathogenesis of Y. enterocolitica and Y. pseudotuberculosis in Human Yersiniosis. Journal of Pathogens (2011).
6. The Most Important Virulence Markers of Yersinia enterocolitica and Their Role during Infection. Genes (2018).