Pharmaceutical Micro

Environmental Isolate Case File: Corynebacterium spp.

Everyone has heard of diphtheria, but this familiar infection caused by a Corynebacterium strain isn’t the only illness laboratories should be concerned about. Sterile manufacturing facilities should also be on the lookout for non-diphtherial Corynebacterium. These strains, commonly found in…
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11 Pour Plate Method Best Practices

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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7 Rules to Follow When Writing about Microorganisms

Recalling and pronouncing peculiar microorganism names is a skill every microbiologist has mastered. However, the intricate rules for writing about microorganisms may leave even experienced microbiologists second-guessing how to annotate or spell a strain name. Our quiz below will challenge…
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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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Our Top Posts from 2017

To say our writers were busy in 2017 is an understatement. We shared best practices for growth promotion testing on selective media, asked for your opinion on B. cepacia testing, and reminded you why microbiologists are the coolest people in…
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Dear Stanley: Tips for Performing QC on ETEST® Strips

Dear Stanley, We recently purchased your KWIK-STIK™ product to perform quality control on new lots of ETEST® strips. Do you have any tips for setting up and reading an ETEST®? Mike from Philadelphia, PA Dear Mike, KWIK-STIK is the perfect…
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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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8 Microorganisms that Changed the World

Microorganisms triggered many events that drastically altered human history. The most notorious microbes caused mass death and destruction, but they also inspired modern medical advances often taken for granted. The significant impact these tiny, invisible-to-the-naked-eye creatures can have on our…
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The Basics of Cannabis QC

Every year cannabis for medical and recreational use becomes legal in more places throughout the United States. As of 2017, 29 states and the District of Columbia (DC) have passed laws to legalize growth and distribution of the plant. Cannabis…
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Cosmetics Quiz: What’s Lurking in Your Makeup Bag?

Your favorite eye shadow has been discontinued by the manufacturer. You’ve managed to extend the life of your palette for three years, but at what cost? Have you thought about the wide array of microbial growth that could be hiding in…
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