Author Archive: Laurie Kundrat

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Laurie Kundrat, MT (ASCP), is a former Microbiologics employee and regular contributing author to the Microbiologics Blog. She has over 30 years of experience as a microbiologist and a clinical technologist. During her career at Microbiologics, Laurie was an active member of the Personal Care Products Council (PCPC) and served as a member of the Microbiology Committee. She graduated from Case Western Reserve University with a degree in biology. She also earned a medical technology degree from Fairview General Hospital. Laurie has grown to love all types of bacteria. She has a passion for working with customers and helping them use Microbiologics products successfully.

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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Tips for Choosing and Using Microorganisms for Education

In 2016, two biologists from Indiana University estimated that there are about a trillion species of bacteria on earth.1 With so many choices, how can a teacher select the best strains for her microbiology class? Below are a few tips…
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8 Antimicrobial Effectiveness Test (AET) Best Practices

What do taking two children, a dog and a cat on a cross-country road trip and performing the Antimicrobial Effectiveness Test (AET) have in common? They both require heaps of planning and an abundance of patience.  So, if the test is…
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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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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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9 Tips for Growth Promotion Testing on Selective Media

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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Hurricane Aftermath: 8 Pathogens that Pose Health Risks

Over the past few weeks, the United States has endured back-to-back Category 4 Atlantic hurricanes. Hurricane Harvey hit first in Texas on August 25th, followed just 16 days later by Hurricane Irma making landfall in the Florida Keys on September…
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Water Quality Quiz: How Well Do You Know Waterborne Pathogens?

The U.S. Environmental Protection Agency (EPA) has designated August as National Water Quality Month.1 Thankfully, tap water in the United States is safe to drink because water utilities are required to meet the standards set by the EPA. Many people in developing…
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Environmental Isolate Case File: Cladosporium cladosporioides

Cladosporium cladosporioides, although generally nonpathogenic, can cause illness. This species, along with Exserohilum rostratum and Aspergillus fumigatus, was one of the pathogens isolated during a multistate outbreak of fungal meningitis due to contaminated sterile medication manufactured by the New England Compounding…
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7 Reasons Why Your Lab Should Perform Growth Promotion Testing

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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