Marijuana Business Magazine July 2019

July 2019 | mjbizdaily.com 91 12 Count Colony-Forming Units After 60-72 hours in a temperature-controlled incubator, the TYAM 3M Petrifilm plates are removed and the CFUs on each plate are counted. The Petrifilm contains an indicator dye that shows the presence of yeast and mold colony-forming units by coloring them blue, making it easier to count the number of colonies. The number of CFUs on the plate correlate to the level of fungal contamination in the product. Several states have an acceptable limit of 10,000 CFUs of yeast and mold per gram of product, and any result over that limit fails testing. Operators can use the data from TYAM testing to monitor changes in their operation. For example, cultivators who introduce a pest-management system can compare the number of CFUs of yeast or mold before and after implementation. That can help them determine whether their new system is decreasing the biocontaminant levels in their products over time. “The Petrifilm contains an indicator dye that shows the presence of yeast and mold colony-forming units by coloring them blue, making it easier to count the number of colonies.” Lab Testing