On-chip parallel detection of foodborne pathogens using loop-mediated isothermal amplification

Area of Science:

• Biotechnology
• Food Safety
• Microbiology

Background:

• Foodborne illnesses affect millions annually, necessitating rapid pathogen detection.
• Current detection methods can be slow and require specialized laboratory equipment.
• Accurate identification of pathogens is crucial for public health and regulatory compliance.

Purpose of the Study:

• To develop a portable device for multiplexed detection of foodborne pathogens.
• To demonstrate the efficacy of loop-mediated isothermal amplification on a silicon chip.
• To enhance food safety through rapid, on-site pathogen screening.

Main Methods:

• Utilized loop-mediated isothermal amplification (LAMP) on a silicon chip.
• Employed silane passivation to prevent polymerase inhibition on silicon oxide.
• Integrated automated microinjection for reagent delivery into micro-machined wells.
• Dehydrated specific primers for Listeria monocytogenes, Escherichia coli, and Salmonella.

Main Results:

• Achieved multiplexed detection of virulence genes from three key foodborne pathogens.
• Demonstrated high sensitivity (down to a few templates per reaction).
• Confirmed specificity for multiplexed screening and robustness without DNA extraction.

Conclusions:

• The developed silicon chip platform enables rapid, sensitive, and specific multiplexed detection of food pathogens.
• This portable device facilitates on-site pathogen screening, improving food safety enforcement.
• The technology offers a promising solution for real-time monitoring of food contamination.