A Far-Red Fluorescent Probe to Visualize Gram-Positive Bacteria in Patient Samples

Area of Science:

• Microbiology
• Biomedical Imaging
• Infectious Diseases

Background:

• Gram-positive bacteria, especially Staphylococcus aureus, are a major cause of death and disease in high-income nations.
• Staphylococcus aureus infections lead to prolonged hospital stays, significant economic costs, treatment failures, and high mortality.
• Understanding the precise locations of Staphylococcus aureus during infections is crucial but currently limited.

Purpose of the Study:

• To develop and validate a novel far-red fluorescent probe for detecting Gram-positive bacteria.
• To specifically target Staphylococcus aureus in human biopsies from deep-seated infections.
• To provide an improved tool for visualizing bacterial presence in complex biological samples.

Main Methods:

• Development of a far-red fluorescent probe with high specificity for Gram-positive bacteria.
• Validation of the probe's performance in human tissue biopsies.
• Demonstration of applications including fixed- and live-cell imaging, flow cytometry, and super-resolution microscopy.

Main Results:

• The developed probe exhibits strong fluorescence and minimal background noise in human tissues.
• It demonstrates superior performance compared to existing methods for Staphylococcus aureus detection.
• Successful visualization of bacteria in various imaging and cytometry applications was achieved.

Conclusions:

• The novel far-red fluorescent probe is a powerful tool for detecting Gram-positive bacteria, particularly Staphylococcus aureus, in human biopsies.
• This probe significantly enhances the visualization of bacteria in deep-seated infections.
• It holds promise for advancing microbiological research, diagnostics, and understanding of staphylococcal infections.