Fast Identification and Quantification of Uropathogenic E. coli through Cluster Analysis

Area of Science:

• Biomedical Engineering
• Microbiology
• Diagnostic Assay Development

Background:

• Effective antibiotic stewardship requires rapid bacterial detection and identification.
• Broad-spectrum antibiotic overuse necessitates development of targeted diagnostic tools.
• Urinary tract infections (UTIs) are common and require timely diagnosis.

Purpose of the Study:

• To develop a rapid diagnostic assay for identifying and enumerating uropathogenic Escherichia coli.
• To enable point-of-care testing for common urinary tract infections.
• To support antibiotic stewardship by providing quick bacterial identification.

Main Methods:

• Development of a 15-minute agglutination assay.
• Utilized mannose-functionalized polymeric microspheres for bacterial capture.
• Employed cluster analysis for bacterial identification and enumeration.
• Tested assay performance in tryptic soy broth and human urine samples.

Main Results:

• Successfully identified and enumerated various Escherichia coli strains, including laboratory, clinical isolates, and uropathogenic strains.
• Achieved detection at clinically relevant concentrations (10^3-10^8 CFU/mL in broth, 10^5-10^8 CFU/mL in urine).
• Demonstrated assay feasibility within a 15-minute timeframe.

Conclusions:

• The developed mannose-functionalized microsphere agglutination assay is a fast, simple, and efficient method for bacterial detection.
• This assay represents a significant advancement towards point-of-care diagnostics for UTIs.
• The tool can aid in reducing unnecessary broad-spectrum antibiotic prescriptions through rapid pathogen identification.