Yeast Test
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Price
$25 per analysis
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Turnaround time 7 – 9 Business Days
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Rush Not Available
Technical data sheet
Print- Method description
Dilutions of the original sample are plated on DRBC agar at room temperature (20°C to 25°C) for five days.
- Acceptable matrices
Foods and food ingredients
- Unacceptable matrices
Cosmetics, non-food samples, water
- Limit of quantitation
Solid food <10 CFU/g Liquid <1 CFU/g. The limit of quantitation can vary based on matrix.
- 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, CFU/mL
- Sample size requirements
100 g
- Information required by submitter
Please supply estimates
- 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)
Common Yeast Test Testing Questions
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.
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