Tag Archive: PCPC

8 Aerobic Plate Count Best Practices

Several factors can influence the accuracy of aerobic plate counts used to estimate the number of microorganisms in food, cosmetic, pharmaceutical, and household products.  Below are a few best practices we recommend for achieving consistent and accurate counts. 1.  Ensure…
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New PCPC Guideline for Investigating Microbial Data Deviations in Personal Care Labs

No matter how precise you are when setting up tests, occasionally errors occur resulting in unexpected outcomes. This is especially true for microbiology assays, which due to the nature of microorganisms, are subject to more variation than chemical assays. For…
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Preservative Testing – Choice of Challenge Isolates

“What you see is that the most outstanding feature of life’s history is a constant domination by bacteria.” – Stephen J. Gould. Preservation capacity is a central element of consumer product quality.  Though necessary to any microbiological risk assessment, adequate…
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5 Reasons to Avoid Maintaining Stock Cultures in Your Lab

Are you certain the reference stock cultures you use for quality control are identical to the reference cultures you originally purchased? A study performed by Cross, Russel and Desai examined working cultures from eight accredited microbial testing laboratories. Using fluorescent…
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Antimicrobial Effectiveness Testing: Keeping Consumers Safe

Everyone uses personal care products, and we expect the products we buy to be safe. Whether a manufacturer is producing shampoo or makeup, preservatives are used to maintain the quality and extend the shelf-life of the product. This post outlines why…
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