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13th September 2021  Content supplied by: Merck

How Does Readybag® BPW Compare to Other Buffered Peptone Water Media? Read the Study


Buffered Peptone Water (BPW) is a culture medium used for the non-selective pre-enrichment of Salmonella and other microorganisms. To meet the rising demand of microbiological food and water testing laboratories for ready-to-use culture media that reduce the likelihood of human error and streamline workflows, Merck offers granulated Buffered Peptone Water in pouches (Readybag® BPW), readily pre-weighed, and gamma-irradiated to avoid autoclaving. These features save time and work in the lab and contribute to overall cost savings.

To evaluate the properties of Readybag® BPW, a study was performed that compares it to four other commercially available Buffered Peptone Water products with respect to:
  • Compliance with relevant standards (ISO 6579-1:2017, ISO 21528-1:2017, ISO 22964:2017, FDA-BAM Method 5:2009, EP 10 chapter 2.6.31)
  • The growth promotion properties for several Salmonella strains (S. Typhimurium, S. Enteritidis, S. Infantis)
  • Buffering capacity, which is important as acidic and acidifying foodstuffs can reduce the pH during sample enrichment

In addition, the study gives the key results of an independent investigation that compared the workflow and cost efficiency of the Readybag® BPW method to traditional or even high-efficiency culture media preparations.

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Date Published: 13th September 2021

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