Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 227, Issue -, Pages 600-609Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.10.116
Keywords
LAMP; Pathogen; Microfluidics; Lab-on-a-disc; Detection; Salmonella
Funding
- University of Malaya (UM) research grant, Program Rakan Penyelidikan UM [CG003-2013]
- Fundamental Research Grant Scheme (FRGS) [FP042-2013B]
- University of Malaya Research Grant(UMRG) [RP009A-13AET]
- MOSTI Science Fund [GA013-2013]
- Sultan Iskandar Johore foundation
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Salmonellosis is one of the most common foodborne diseases caused by the genus Salmonella and is considered to be a significant global health concern. Therefore, the development of effective techniques for rapidly detecting Salmonella is fundamental in preventing foodborne outbreaks. This paper presents a lab-on-a-disc integrated loop mediated isothermal amplification (LAMP) on a microfluidic platform for Salmonella detection. We have developed a centrifugal microfluidic platform device in which the main steps in pathogen detection, reagent preparation, LAMP, and detection can be integrated onto a single microfluidic compact disc (CD). A forced convection heating source was used for wax valve actuation and temperature heating for the LAMP amplification, leading toward compactness and system miniaturization. The detection limit was 5 x 10(-3) ng/mu L DNA concentration when tested on tomatoes spiked with Salmonella. The whole procedure, from sample preparation (on the microfluidic CD) up to detection, was completed within 70 min using a fully automated process. The final detection step was performed via direct visual observation of the color change of the SYBR Green I dye. Our system offers a fast and automated molecular diagnostic platform, thereby reducing the need for skillful operators and expensive instrumentation. This developed portable device would have a wide range of potential biomedical applications, including foodborne pathogen detection and molecular diagnostics in developing countries. (C) 2015 Elsevier B.V. All rights reserved.
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