Rapid and fully automated bacterial pathogen detection on a centrifugal-microfluidic LabDisk using highly sensitive...

Area of Science:

• Clinical Microbiology
• Molecular Diagnostics
• Biotechnology

Background:

• Culture-based bacterial identification is slow, delaying targeted antimicrobial therapy.
• Existing rapid molecular diagnostics often involve complex workflows and equipment, limiting routine clinical use.

Purpose of the Study:

• To develop a rapid, sensitive, and user-friendly molecular diagnostic platform for bacterial pathogen detection at the point-of-care.
• To automate integrated DNA extraction, PCR pre-amplification, and real-time PCR on a single device.

Main Methods:

• Development of a centrifugal-microfluidic LabDisk system with pre-stored reagents.
• Fully automated workflow including DNA extraction, consensus multiplex PCR, and species-specific real-time PCR.
• Minimal hands-on time (approx. 5 minutes) for sample and reagent loading.

Main Results:

• Detection of low colony-forming units (cfu) of key bacterial pathogens (e.g., Staphylococcus warneri, Escherichia coli) in serum samples.
• Achieved a complete "sample-to-result" turnaround time of 3 hours and 45 minutes.
• Demonstrated high sensitivity and specificity for multiple bacterial species.

Conclusions:

• The LabDisk system offers a simplified, automated solution for rapid bacterial pathogen detection.
• This point-of-care platform can significantly reduce diagnostic turnaround times in clinical microbiology.
• Enables faster, evidence-based antimicrobial treatment decisions, improving patient outcomes.