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Yeast Test

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  • 7-9 business days
    • |
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Technical data sheet

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Method description

Dilutions of the original sample are plated on DRBC agar at room temperature (20°C to 25°C) for five days.

Equipment

Standard Microbiology Equipment

Method reference

Compendium of Methods for the Microbiological Examination of Foods 4th Edition: Chapter 20
FDA BAM, Chapter 18

Reportable unit

CFU/g

Sample size requirements

100g

Additional information

These are usually considered significant spoilage organisms in high acid or low water activity products. They can also serve as quality indicators in grain ingredients and products.

Yeast and mold cause various degrees of deterioration and decomposition of foods. Yeast and mold can invade and grow on virtually any type of food at any time; they invade crops such as grains, nuts, beans, and fruits in fields before harvesting and during storage. They also grow on processed foods and food mixtures. Their delectability in or on foods depends on food type, organisms involved, and degree of invasion. The contaminated food may be slightly blemished, severely blemished, or completely decomposed, with the actual growth manifested by rot spots of various sizes and colors, unsightly scabs, slime, white cottony mycelium, or highly-colored sporulating mold. (BAM Online 2001 Chapter 18 https://www.cfsan.fda.gov/~ebam/bam-18.html)

*Prices and offerings are subject to change without notice.

Common Yeast Test Testing Questions

While our sales and customer service team are happy to answer general testing questions, consultations typically start at a rate of $250 per 30 minutes regarding the interpretation of reported test results or questions about our test methods. We cannot consult on regulations, tolerance limits, or claims.

We make every effort to keep our methods and detection limits up to date according to the latest standards and qualifications. If you have any questions regarding the limit of detection/quantification or method references, please contact our Customer Service team at 1-800-245-5615.

Our standard turnaround time is 10 business days for most assays. There are some assays that require a longer turnaround time. We also offer a RUSH service that is half the time of the standard turnaround time of the assay at double the cost of the assay. A few assays that we provide cannot be rushed due to the nature of the test. Please check the specific assay you are interested in regarding the ability to RUSH the turnaround time.

Medallion Labs, a division of General Mills, offers multiple areas of expertise for analytical testing and product evaluation for the food and ingredient industry. Our areas of expertise include Chemical Analysis, Nutritional Analysis, Food Safety, Shelf Life Studies, Microbiology, Specialty Fibers, Physical Testing, Allergen Testing, as well as Product Evaluation (which includes Product Performance and Sensory Evaluation) and Technical Consulting/Method Development. Our methods are developed for the testing of food products and ingredients.

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