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Published on: October 23, 2011
Simultaneous detection and identification of Bacillus cereus group bacteria using multiplex PCR
Si-Hong Park1, Hyun-Joong Kim, Jae-Hwan Kim
1Institute of Life Sciences & Resources, Graduate School of Biotechnology, Kyung Hee University, Suwon 449-701, Korea.
Journal of Microbiology and Biotechnology
|December 7, 2007
Summary
A new multiplex PCR method efficiently identifies Bacillus cereus group bacteria. This reliable technique uses gyrB and groEL genes for simultaneous detection in food samples.
Area of Science:
- Microbiology
- Molecular Biology
Background:
- Bacillus cereus group bacteria exhibit high genetic similarity, complicating identification.
- Accurate differentiation is crucial for food safety and public health.
Purpose of the Study:
- To develop and validate a multiplex PCR assay for the simultaneous detection of Bacillus cereus group bacteria.
- To utilize gyrB and groEL genes as specific diagnostic markers.
Main Methods:
- A multiplex PCR assay was designed using gyrB and groEL genes.
- The assay's specificity was tested against 29 other pathogenic bacteria.
- Sensitivity and specificity were evaluated using various food samples.
Main Results:
- The assay produced a 400 bp amplicon for groEL in all tested B. cereus group bacteria.
- Specific gyrB amplicons differentiated B. anthracis (253 bp), B. cereus (475 bp), B. thuringiensis (299 bp), and B. mycoides (604 bp).
- No cross-reactivity was observed with other bacterial DNA.
Conclusions:
- The developed multiplex PCR method is a reliable, rapid, and efficient tool for simultaneous identification of B. cereus group bacteria.
- This assay is suitable for routine analysis of food samples.
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