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Author Spotlight: Efficiently Eliminating Bacteriophages from Infected Salmonella Cultures Using Lipopolysaccharides
Published on: June 28, 2024
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Salmonella Detection in Eggs Using LuX Bacteriophages
Jinru Chen1, Mansel W Griffiths1
1Department of Food Science, University of Guelph, Guelph, Ontario, Canada N1G 2W1.
Journal of Food Protection
|June 5, 2019
Summary
This study developed novel recombinant bacteriophages to detect Salmonella bacteria. These engineered phages enable sensitive and rapid detection of Salmonella in various samples, including whole eggs, using bioluminescence.
Area of Science:
- Microbiology
- Biotechnology
- Food Safety
Background:
- Salmonella spp. pose a significant threat to public health and food safety.
- Rapid and sensitive detection methods for Salmonella are crucial for effective control.
Purpose of the Study:
- To construct recombinant bacteriophages for Salmonella detection.
- To evaluate the sensitivity and speed of a phage-based bioluminescence assay for Salmonella.
Main Methods:
- Construction of recombinant bacteriophages carrying bacterial luciferase genes.
- Detection of Salmonella using phage-induced luminescence with various imaging devices.
- Assessing detection limits and time requirements under different conditions.
- Application of the assay in whole egg samples.
Main Results:
- Recombinant phages successfully induced luminescence in Salmonella spp.
- The assay detected Salmonella isolates from groups B, D, and C.
- Sensitivity reached 10 CFU/ml with 6-hour preincubation.
- Rapid detection (1-3 hours) of high bacterial concentrations (10^8 CFU/ml) was achieved.
- The assay was effective in whole eggs.
Conclusions:
- Recombinant bacteriophages offer a sensitive and rapid method for Salmonella detection.
- The bioluminescence assay is versatile and applicable to food matrices like whole eggs.
- This technology has potential for improving food safety and public health surveillance.
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