Bacterial Pathogenesis: Assessment of Intracellular Positioning of Pathogen-Containing Vacuoles During Infection

Area of Science:

• Microbiology
• Cell Biology
• Pathogenesis

Background:

• Intracellular bacterial pathogens utilize diverse strategies to infect host cells.
• Pathogen-vacuole trafficking within host cells is essential for survival, replication, and spread.
• Understanding bacterial intracellular positioning is key to deciphering infection dynamics.

Purpose of the Study:

• To develop and present a quantitative fluorescence microscopy method for assessing bacterial intracellular positioning.
• To utilize Salmonella enterica serovar Typhimurium in epithelial cells as a model system.
• To provide adaptable tools for studying various intracellular pathogens and host-pathogen interactions.

Main Methods:

• Development of a fluorescence microscopy-based protocol for quantitative analysis of bacterial positioning.
• Utilizing Salmonella enterica serovar Typhimurium infection model in epithelial cells.
• Adaptable protocols for host cell preparation, infection, staining, and microscopy analysis.

Main Results:

• A robust method for quantitatively assessing bacterial intracellular positioning was established.
• The method allows for detailed analysis of pathogen-vacuole trafficking dynamics.
• The approach is versatile and applicable to diverse host cell types and pathogens.

Conclusions:

• The developed fluorescence microscopy method provides fundamental insights into intracellular bacterial pathogenesis.
• This technique facilitates the identification of virulence factors mediating host trafficking.
• It enables the investigation of host factors hijacked by pathogens and functional domains of virulence factors.