Performing growth promotion testing (GPT) on new batches of media is an essential task for all sterile and non-sterile pharmaceutical manufacturing laboratories. Your laboratory performs GPT regularly, but are you certain of what best practices auditors will look for when…
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Dear Stanley, When performing growth promotion with Microbiologics products, do you recommend testing in parallel with a previously approved media? The USP, EP, and JP don’t require testing in parallel. They only state “Test each batch of ready-prepared medium and…
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Audits are a fact of life for ISO 17025 food laboratories. Being prepared for an audit is important, but you may not know exactly what auditors are looking for when they review your microbial QC practices. We’ve compiled a list…
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The growth promotion test (GPT) can be a hassle, but it’s necessary for determining if a new batch of media is acceptable. Follow our best practices below to make your testing process as smooth as possible when using Microbiologics products…
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Dear Stanley, I use EZ-Accu Shot™ for growth promotion testing (GPT), and sometimes I don’t get counts within 50-200% of the count printed on the label. Is there something wrong with my media or the control? Sincerely, Beverly Fresno, CA…
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The pour plate method is an economical way for pharmaceutical, contract and even food laboratories to perform tests focused on a specific number of bacteria. The process may seem simple (melt, pipette, pour, swirl, incubate), but errors have been known…
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The U.S. Pharmacopeia (USP) created quite the challenge when it designed the growth promotion test (GPT) for selective media. Laboratories not only need to test new batches of media with less than 100 colony-forming units (CFU), the colonies must also…
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Growth Promotion Test (GPT) – this combination of words might make you wince, but the test is essential for labs following pharmacopeia guidelines. GPT is more challenging than a qualitative or ecometric test. It is deemed successful if a small…
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2016 was an exciting year for the Microbiologics Blog. We celebrated our first birthday, got into the spirit of the Olympics, and asked why you love working in a lab. Take a break and learn something new while you catch…
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