PRY (PRESERVATIVE RESISTANT YEAST) BROTH

General description

Preservative Resistant Yeast broth is used for the detection of preservative resistant yeasts in water and beverage testing using the membrane filtration method. PRY Broth is a selective medium with a low pH used for the detection of spoilage microorganisms in beverages and water testing. It is used to selectively isolate and enumerate Zygosaccharomyces species.{16} The medium prevents growth of other yeasts such as Saccharomyces cerevisiae that are tolerant to lower levels of commonly used food preservatives. Spoilage resulting from growth of the yeast Zygosaccharomyces is widespread, which has caused significant economic losses to the food industry. Yeast extract in the medium provides the essential nutrients, while mannitol acts as source of fermentable carbohydrate and the Colonies appear yellow.

Application

PRY Broth is a low pH selective medium for the detection of spoilage microorganisms in beverages, Beer, Bottled Water, Cider, Soft Drink, Sport Drink and Wine. The media finds its application in Clinical, Cosmetics, Environmental Analysis, Food and Beverage and Industrial QC.

Packaging

2 mL plastic ampoules

Specifications

Incubation Temperature: 30 °C

Incubation Time: 24–48 hrs

Culture Medium

Preservative Resistant Yeast

Analysis Note

Colonies appear yellow

QC organisms
Z. bailii (ATCC 58445)

Target Microorganisms: Yeast, preservative resistant

Legal Information

MICROFIL is a registered trademark of Merck KGaA, Darmstadt, Germany

MICROPRESURE is a registered trademark of Merck KGaA, Darmstadt, Germany

MILLIFLEX is a registered trademark of Merck KGaA, Darmstadt, Germany