This invention is an improved process for preparing a food or beverage sample containing yeast or moid cells for analytical testing. The food sample is prepared into the form of a filterable liquid, and then filtered using a glass microfiber filter. The filter containing the fungal cell retentate is then placed into a disruption vessel and bead beaten until the glass microfiber filter is completely disrupted into glass fibers in suspension. An aliquot can then be tested directly using melting curve analysis of PCR amplification product derived from the nucleic acids of the sample to detect the presence of the fungal cells from the sample.
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