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Bacterial separation and concentration from complex sample matrices: a review.

Kelly A Stevens1, Lee-Ann Jaykus

  • 1Department of Food Science, College of Life Science and Agriculture, North Carolina State University, Raleigh, North Carolina 27695-7624, USA.

Critical Reviews in Microbiology
|May 1, 2004
PubMed
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Separating and concentrating bacteria from food samples is key to improving rapid detection methods. This review explores techniques to overcome challenges in bacterial cell isolation for enhanced foodborne pathogen analysis.

Area of Science:

  • Food Microbiology
  • Analytical Chemistry
  • Molecular Biology

Background:

  • Rapid detection technologies for foodborne pathogens can be enhanced by pre-detection steps.
  • Bacterial concentration offers advantages like removing inhibitors and enabling detection of multiple strains.
  • Current methods face limitations in adaptability across different food matrices and microorganisms.

Purpose of the Study:

  • To review the science, possibilities, and limitations of bacterial separation and concentration from food matrices.
  • To improve the application of molecular methods for rapid foodborne pathogen detection.
  • To address the challenges in sample preparation for pathogen analysis.

Main Methods:

  • Review of existing literature on bacterial concentration techniques (e.g., centrifugation, filtration, immunomagnetic separation).

Related Experiment Videos

  • Analysis of the effectiveness and limitations of these methods in various food systems.
  • Discussion of the impact of sample matrix on separation and concentration efficiency.

    • Main Results:

    • Bacterial concentration can facilitate pathogen detection, remove inhibitors, and reduce sample size.
    • No single concentration method is universally ideal for all food types and bacteria.
    • Effective separation and concentration remain a significant hurdle for molecular detection methods.

    Conclusions:

    • Optimized bacterial separation and concentration are crucial for advancing rapid molecular detection of foodborne pathogens.
    • Further research is needed to develop versatile and efficient methods.
    • Overcoming sample preparation challenges will enhance food safety surveillance.