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RAPD and rep-PCR fingerprinting for characterization of Bifidobacterium species
J Krízová1, A Spanová, B Rittich
1Institute of Experimental Biology, Faculty of Science, Masaryk University, 602 00, Brno, Czechia.
Folia Microbiologica
|May 27, 2008
Summary
DNA fingerprinting techniques like RAPD and rep-PCR effectively identified Bifidobacterium strains. This study confirmed the classification of B. animalis ssp. lactis and reclassified a B. adolescentis strain.
Area of Science:
- Microbiology
- Genetics
Background:
- Accurate identification of Bifidobacterium strains is crucial for probiotics and human health research.
- Existing classification methods may require molecular confirmation for precise strain differentiation.
Purpose of the Study:
- To evaluate the efficacy of DNA fingerprinting methods for discriminating Bifidobacterium strains.
- To accurately identify and reclassify specific Bifidobacterium strains from human origin and a culture collection.
Main Methods:
- Random Amplified Polymorphic DNA (RAPD) analysis using 7 random primers.
- Repetitive sequence-based PCR (rep-PCR) using BOXA1R and (GTG)(5) primers.
- Analysis of 16 type and collection Bifidobacterium strains from 9 species.
Main Results:
- Both RAPD and rep-PCR yielded similar and reliable results for strain discrimination.
- Six strains were identified as Bifidobacterium animalis subspecies lactis, and one as Bifidobacterium adolescentis.
- Strain CCM 3761, previously classified as B. adolescentis, was confirmed as Bifidobacterium pseudocatenulatum.
Conclusions:
- DNA fingerprinting methods, specifically RAPD and rep-PCR, are effective tools for Bifidobacterium strain identification.
- The study confirmed the taxonomic status of several Bifidobacterium strains and corrected a misclassification.
- Accurate strain identification is essential for probiotic applications and understanding Bifidobacterium diversity.
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