Comparison of Petrifilm and plate count methods for enumerating molds and yeasts in cheese and yogurt
1994
Vlaemynck, G.M.
The Petrifilm method for enumerating yeasts and molds was evaluated on 52 samples of fresh cheese and yogurt. A conventional plate method on glucose yeast extract medium with oxytetracycline was used as reference. Counting the repeatability a value of 0.229 log units was obtained for the Petrifilm, compared to 0.175 for the conventional plate method. The correlation coefficient was 0.9978 with a residual standard deviation of 0.094 log units. The Petrifilm method is practical and fast, and its results may be compared to those of the conventional plate method.
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