Research Topic: food safety

Different metabolite profiles across Penicillium roqueforti populations associated with ecological niche specialisation and domestication

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This study examined how different populations of the blue cheese fungus Penicillium roqueforti produce varying amounts of toxic and beneficial compounds depending on their environment. Cheese-making strains were found to produce fewer toxins than strains from spoiled food and lumber, likely due to selective breeding for safer products. The research identified specific genetic mutations that prevent cheese strains from producing certain toxins, helping explain why some cheese strains are safer than others.

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Newly Discovered Fungal Species from Black Pepper Marketed in Brazil: Penicillium pipericola sp. nov. and Syncephalastrum brasiliense sp. nov.

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Researchers in Brazil discovered two new fungal species found on commercially sold black pepper. While one species can produce a toxic compound that concerns food safety experts, both species also produce molecules with potential medical benefits, including compounds that may help fight cancer and neurological diseases. This discovery highlights the importance of monitoring fungi in food products while also revealing unexpected pharmaceutical potential hidden in everyday spices.

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Modelling the Combined Effects of Oxalic Acid, Water Activity, and pH on the Growth and Mycotoxin Production of Aspergillus spp. in a Dried Fig System

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This research develops computer models to predict when dangerous molds grow on dried figs and produce toxins. Scientists tested how wet the figs are, their acidity, and a natural plant compound called oxalic acid affect the growth of two common toxic molds. The study found that drier figs are much safer from toxin production, and while oxalic acid alone isn’t a strong mold-fighter, it can help when combined with other conditions. These models can help the fig industry prevent contamination and keep dried figs safe for consumers.

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New insights into the stress response mechanisms of stress-resistant Listeria monocytogenes via multi-omics and cell morphological changes

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Researchers studied how a dangerous food-poisoning bacterium called Listeria monocytogenes survives in harsh conditions like cold temperatures, acidic environments, and salty food products. Using advanced molecular analysis techniques, they identified specific genes and proteins that help the bacteria survive these stressful conditions. They also observed that the bacteria changed shape when exposed to stress, becoming elongated and bumpy. This research helps food safety experts better understand and combat this persistent food contaminant.

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Unveiling the Substrate-Dependent Dynamics of Mycotoxin Production in Fusarium verticillioides Using an OSMAC-Metabolomics Approach

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Researchers studied how different growing conditions affect the production of harmful toxins by a fungus called Fusarium verticillioides that contaminates crops. Using advanced chemical analysis techniques, they found that the type of growth medium and time of incubation significantly influenced which toxins the fungus produced and in what amounts. Growing the fungus on corn-based medium produced different toxins than growing it on barley-based medium. These findings can help develop better strategies to prevent mycotoxin contamination in food and animal feed.

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