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Strain-specific identification of Bifidobacterium bifidum OLB6378 by PCR

Takayuki Toshimitsu1, Marie Nakamura, Shuji Ikegami

  • 1Lactic Acid Bacteria Research Department, Food Science Research Laboratories, Division of Research and Development, Meiji Co., Ltd., Odawara, Kanagawa, Japan. takayuki.toshimitsu@meiji.com

Bioscience, Biotechnology, and Biochemistry
|March 9, 2013
PubMed

Insights

Researchers developed a specific polymerase chain reaction (PCR) primer set to detect Bifidobacterium bifidum OLB6378, a potential probiotic for infants. This new primer set enables accurate identification and quantification of this beneficial bacterial strain.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Probiotics Research

Background:

  • Bifidobacterium bifidum strains are recognized for their probiotic potential, particularly for infant health.
  • Accurate identification and quantification of specific probiotic strains are crucial for efficacy and safety.
  • Existing methods may lack the specificity required for precise strain-level detection.

Purpose of the Study:

  • To develop a highly specific polymerase chain reaction (PCR) primer set for Bifidobacterium bifidum OLB6378.
  • To enable reliable detection and quantification of the OLB6378 strain for probiotic applications.

Main Methods:

  • Utilized random amplified polymorphic DNA (RAPD)-PCR to identify unique DNA markers for OLB6378.
  • Sequenced a specific RAPD-PCR product to design novel PCR primers.
  • Tested the developed primer set against various Bifidobacterium strains, including B. bifidum and other species.

Main Results:

  • Successfully identified one OLB6378-specific RAPD-PCR product after screening 97 primers.
  • Designed and validated a novel PCR primer set that specifically amplifies a single product from OLB6378 genomic DNA.
  • Demonstrated the primer set's specificity by its failure to amplify DNA from other tested B. bifidum strains and related Bifidobacterium species.

Conclusions:

  • Developed a robust and specific primer set for the detection and quantification of Bifidobacterium bifidum OLB6378.
  • The primer set is suitable for identifying OLB6378, a promising probiotic for infants.
  • This tool will aid in quality control and research involving this specific probiotic strain.

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