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Detection and quantification of Bacillus cereus group in milk by droplet digital PCR by Davide Porcellato; Judith Narvhus; Siv Borghild Skeie is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Detection and quantification of Bacillus cereus group in milk by droplet digital PCR about?

Droplet digital PCR (ddPCR) is one of the newest and most promising methods for the detection and quantification of molecular targets by PCR. Here, we optimized and used a new ddPCR assay for the detection and quantification of the Bacillus cereus group in milk. We also compared the ddPCR to a standard qPCR assay. The new ddPCR assay showed a similar coefficient of determination and a better limit of detection compared to the qPCR assay during quantification of the target molecules in the samples. However, the ddPCR assay has a limitation during quantification of a high number of target molecules. This new assay was then tested for the quantification of the B. cereus group in 90 milk samples obtained over three months from two different dairies and the milk was stored at different temperatures before sampling. The ddPCR assay showed good agreement with the qPCR assay for the quantification of the B. cereus group in milk, and due to its lower detection limit more samples were detected as positive. The new ddPCR assay is a promising method for the quantification of target bacteria in low concentration in milk.

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Author

Davide Porcellato; Judith Narvhus; Siv Borghild Skeie

Publisher

Elsevier BV

Published

2016

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)