Microchimica Acta

, Volume 178, Issue 3–4, pp 381–387 | Cite as

Electrokinetically-controlled RNA-DNA hybridization assay for foodborne pathogens

  • Xuan Weng
  • Hai Jiang
  • Dongqing LiEmail author
Original Paper


We have developed a microfluidic chip for use in an RNA-DNA hybridization assay for foodborne pathogens. Automatic sequential reagent dispensing and washing was realized with a programmable DC voltage sequencer. Signal detection was achieved with a miniaturized optical detection module. Salmonella and Listeria monocytogenes bacteria in different concentrations were quantitatively determined by this RNA-DNA hybridization assay in the microfluidic chip. The detection limit for the Salmonella and Listeria monocytogenes bacteria is 103 to 104 CFU mL−1. The method excels by a significant reduction in the consumption of sample and reagent, and a short assay time. This automatic-operating microfluidic RNA-DNA hybridization assay is promising for on-site pathogen detection.


An RNA-DNA hybridization assay microfluidic chip with electrokinetic control for foodborne pathogens detection was developed. Salmonella and Listeria monocytognes bacteria of different concentrations were tested on the RNA-DNA hybridization assay microfluidic chip. The major advantages of this method include significant reduction in the sample and reagent consumption, and substantially short assay time


RNA-DNA hybridization assay Electrokinetics Microfluidics Salmonella Listeria monocytogenes 



The authors would like to express appreciation to the financial support of the Canada Research Chairs program and the Natural Sciences and Engineering Research Council (NSERC) of Canada through a research grant to Dr. Dongqing Li. Thanks also go to Dr. Shu Chen and Dr. Honghe Cao (Laboratory Services Division, University of Guelph) for providing the reagents and bacterial samples.


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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.Department of Mechanical and Mechatronics EngineeringUniversity of WaterlooWaterlooCanada

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