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Crystal Diagnostics MultiPath System™.

Curtis H Stumpf, Weidong Zhao, Brian Bullard

    Journal of AOAC International
    |January 30, 2015
    PubMed
    Summary

    The Crystal Diagnostics MultiPath System™ rapidly detects Escherichia coli O157 in raw beef and spinach. This liquid crystal biosensor offers USDA-FSIS and FDA-BAM comparable accuracy for enhanced food safety.

    Area of Science:

    • Food Safety
    • Microbiology
    • Biosensor Technology

    Background:

    • Escherichia coli O157 (E. coli O157) is a significant foodborne pathogen.
    • Accurate and rapid detection methods are crucial for preventing outbreaks.

    Purpose of the Study:

    • To evaluate the Crystal Diagnostics MultiPath System™ for E. coli O157 detection.
    • To assess the system's performance in various food matrices.

    Main Methods:

    • Utilized patented Liquid Crystal technology with antibody-coated paramagnetic microspheres.
    • Tested on fresh raw ground beef, raw beef trim, and spinach samples.
    • Compared performance against U.S. Department of Agriculture Food Safety Inspection Service (USDA-FSIS) and U.S. Food and Drug Administration Bacteriological Analytical Manual (FDA-BAM) methods.

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    Main Results:

    • The system demonstrated rapid and sensitive detection of E. coli O157.
    • Achieved sensitivity comparable to USDA-FSIS and FDA-BAM methods (as low as 1 CFU/375g for beef, 1 CFU/200g for spinach).
    • Internal inclusivity validation confirmed detection of all 50 tested E. coli O157 strains.

    Conclusions:

    • The Crystal Diagnostics MultiPath System™ is a viable, rapid, and sensitive tool for detecting E. coli O157 in raw meat and spinach.
    • This liquid crystal-based biosensor offers a commercially available solution for pathogen detection.