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Automated diagnostic analyzers have transformed clinical microbiology by providing rapid and reliable methods for pathogen identification and antibiotic susceptibility testing. Among these systems, the Vitek 2 is widely used because it automates the traditionally labor-intensive processes of microbial identification (ID) and antibiotic susceptibility testing (AST), delivering standardized and timely results that are essential for effective patient care.Microbial Identification with ID CardsThe...

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Microfluidic Chip Fabrication and Method to Detect Influenza
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An integrated valved microfluidic platform for rapid and simultaneous nucleic acid detection.

Zihan Wang1, Fuwan Yang1, Shuai Zeng1

  • 1Tianjin Key Laboratory of Life and Health Detection, Life and Health Intelligent Research Institute, Tianjin University of Technology, Tianjin, People's Republic of China. duyichen@email.tjut.edu.cn.

Lab on a Chip
|December 24, 2025
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Summary

This study introduces an integrated microfluidic device for rapid, low-cost pathogen detection using recombinase polymerase amplification (RPA) and CRISPR diagnostics. The user-friendly platform streamlines sample preparation for point-of-care nucleic acid testing.

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Area of Science:

  • Biotechnology
  • Microfluidics
  • Molecular Diagnostics

Background:

  • CRISPR-based diagnostics for point-of-care pathogen detection face challenges due to complex sample preparation.
  • Existing methods are often time-consuming and require significant user intervention, limiting their use in resource-limited settings.

Purpose of the Study:

  • To develop a low-cost, integrated microfluidic device for simultaneous nucleic acid detection.
  • To simplify and automate the multi-step sample preparation and detection process for point-of-care applications.

Main Methods:

  • An integrated valved microfluidic device combining recombinase polymerase amplification (RPA), CRISPR signal amplification, and lateral flow readout was developed.
  • Key reagents (RPA mix, Cas12a/crRNA, proteinase K lysis buffer) were pre-lyophilized for stability and ease of use.
  • The device sequentially controlled the assay steps via simple valve operation, minimizing user intervention.

Main Results:

  • The platform achieved a sensitivity of 20 copies/reaction for HPV16/18 plasmids.
  • Human papillomavirus (HPV) in cervical cancer cell lysates was accurately genotyped within one hour.
  • Results showed complete concordance with quantitative PCR (qPCR) methods.

Conclusions:

  • The integrated microfluidic device offers a user-friendly, visual readout for nucleic acid-based testing.
  • This platform is a powerful tool for point-of-care and self-testing in resource-limited settings.
  • The automated, streamlined assay significantly reduces time and user intervention compared to traditional methods.