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Entis P, Athar A, Ballenger M, Bendeck MS, Birbari W, Brock G, Curiale MS, Estvander J, Fung DYC, Green K, Ingham SC, Jafary MM, Jagow JA, Kalinowski R, Kelley G, Lee YJ, Lerner I, Lin CCS, Mendenhall CK, Tomer J, Reyes D, Rivera G, Rudolph C, Ryu JH, Sado P, Snider J, Soto-Lopez L, Thakur RAH, Watson J, White SA, Wilkin E, Williams WD. Two-Day Hydrophobic Grid Membrane Filter Method for Yeast and Mold Enumeration in Foods Using YM-11 Agar: Collaborative Study. J AOAC Int 1996. [DOI: 10.1093/jaoac/79.5.1069] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Twenty laboratories participated in a collaborative study to validate a 2-day hydrophobic grid membrane filter method using YM-11 agar for enumeration of yeast and mold in foods. Six naturally contaminated food products were included in the study: garlic powder, raw ground beef, walnuts, flour/meal, orange juice, and yogurt. The test method produced significantly higher results than the 5-day pour plate reference method for orange juice and significantly lower, though numerically similar, results for walnuts and yogurt. Differences between the test and reference methods were not significant for garlic powder, raw ground beef, or flour/meal. Repeatability and reproducibility were similar for both the test and reference methods in all cases. The hydrophobic grid membrane filter method for enumeration of yeast and mold in foods has been adopted by AOAC INTERNATIONAL.
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Affiliation(s)
- Phyllis Entis
- QA Life Sciences, Inc., 6645 Nancy Ridge Dr, San Diego, CA 92121
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