All articles written by Benjamin Wolfe

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What causes cheese to turn pink?

Various attributes of a cheese, including both flavor and appearance, contribute to the final quality of the product. During the production of some cheeses, microbial processes can cause strange quality defects, often with colorful outcomes. Researchers in University College in Cork, Ireland identified the microbial culprit behind a notorious pink cheese defect. In this Science Digested, Adam Shutes from the Boston Cheese Cellar explains what they found.

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Cheese mites, gophers of cheese rinds

Next time you buy a piece of cheese with a mottled natural rind, such as a clothbound Cheddar or Tomme de Savoie, take a close look at the rind with a magnifying glass. If you look long enough, you will see tiny pieces of the rind are moving! These specks are microscopic arachnids known as cheese mites. Gophers of the cheese world, these tiny mites can both impart flavors as well as cause headaches for cheese producers.

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Geotrichum candidum: A yeast holding on to its moldy past

Have you ever noticed those goat’s milk cheeses with the wrinkly surface at the cheese shop? They look like a fuzzy white brain or a dusty grey coral and they smell like sweet, buttery flatulence. Those aesthetics and aromas come from the growth of the fungus Geotrichum candidum. Using in-depth genomic sequencing, French scientists recently unlocked the evolutionary history of this important cheese microbe and revealed a fungus with an identity crisis.

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Organic and conventional flours produce different sourdough fermentations

It’s difficult to connect the dots throughout our complex food system. Although it is rarely demonstrated scientifically, we generally accept that what happens on farms impacts the quality of our food. For microbial foods, the raw materials we use in fermentation can introduce different microbes depending on how those materials were produced. A recent study in Italy of sourdough fermentation demonstrated that organic vs. conventional farming can affect the quality of sourdough bread. This exciting new research highlights the role that microbes play in shaping food quality as it moves along the path from farm to fork.

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Microbe guide: Chrysosporium sulfureum

If you’ve ever spotted yellow fluff on the surface of a cheese rind, you were probably looking at the mold Chrysosporium sulfureum. Considered a typical fungal species on the rinds of many classic French cheeses including Tomme de Savoie and Saint-Nectaire, this cave-loving fungus is widespread, but enigmatic. Here’s a summary of the little that we do know about this cheese fungus.

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Can good viruses keep bad bacteria out of fermented foods?

Food scientists have developed a diverse toolkit to help food producers keep pathogens out of fermented foods, including pasteurization, raw ingredient and end-product testing, and the addition of natural preservatives. Over the past decade, a new technology using viruses that attack pathogenic bacteria (bacteriophages), has emerged on the market as a potential addition to this food safety toolkit. Here we explain the science of using good viruses to kill bad bacteria in fermented foods.

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Lifestyle for Food: Fermentation guru Jeremy Ogusky, is a professional potter who makes and sells fermentation crocks .

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Profile: Jeremy Ogusky – Culturing Fermentation Culture in Boston

Across the globe, local communities are forming fermentation communities – groups that meet to teach each other techniques and build a sense of community over delicious microbial foods. Over the past five years, a local potter in Boston, Massachusetts, has helped organize and educate a rapidly growing fermentation community. In this guest post, Maria Ordovas, explores how a fermentation culture is being formed in Boston. [click to view the full story]

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A new mold species discovered on salami

Our world is full of organisms that scientists have yet to discover and officially describe as a species. You may have heard in the news about a new species of amphibian discovered in a remote rainforest or new species of fish discovered at the bottom of the sea. But you don’t have to travel to far flung places to find new species. Sometimes they are right under our noses…. growing on salami.

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Profile: Susan O’Regan-Reidy from Seacrest Foods

It can be a long and winding road as a fermented food moves from producer to consumer. In the middle of that trip are food distributors who have to ensure that these living foods have a pleasant journey. When I taught a food microbiology course at Boston University’s Gastronomy Program last spring, I met Susan O’Regan-Reidy, a microbe-loving sales representative from Seacrest Foods. Susan has the unique perspective of seeing products like cheeses, salamis and other fermented foods move from producers all the way to the hands of consumers. I asked Susan to share her perspective in this Profile for MicrobialFoods.org.

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Profile: Hosta Hill – farmers, fermenters, and mold tamers

In an unassuming basement tucked in the hills of the Berkshires, Maddie Elling and Abraham (Abe) Hunrichs rot vegetables and grow mold. As “partners in business and partners in life,” their company Hosta Hill is providing farmers’ markets and stores in Massachusetts with some of the finest vegetable ferments and tempeh in the region. In this Profile, I’ll share what I learned at Hosta Hill about taming tempeh molds, the challenges of artisan fermentation production, and the joys of growing raw materials for fermentation.

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