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Updated: Jan 24, 2026

Isolation of Culturable Yeasts and Molds from Soils to Investigate Fungal Population Structure
Published on: May 27, 2022
Two-Day Yeast and Mold Enumeration Using the ISO-GRID® Membrane Filtration System in Conjunction with YM-11 Agar
1QA Life Sciences, Inc., 6645 Nancy Ridge Drive, San Diego, California 92121, USA.
Abstract:
A 2-day yeast and mold enumeration procedure using the ISO-GRID® membrane filtration system in conjunction with a new culture medium, YM-11 agar, was compared to the conventional 5-day pour plate method using antibiotic-supplemented potato dextrose agar. Performance of the new method was evaluated using both pure cultures of yeasts and molds and 275 food samples, representing 25 different food products. The 2-day ISO-GRID® method yielded counts equivalent to or significantly higher than the 5-day pour plate method in 23 of the 25 food product categories.
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