When detecting Salmonella spp and Listeria monocytogenes in food production, it is essential to consider the environments in which these pathogens thrive. For example, Salmonella spp tends to exist in dry environments such as flour, bakery products, biscuits, chocolate, herbs, spices, milk powder, and cheese powder. On the other hand, Listeria monocytogenes prefers wet and cold environments and can spread through regular cleaning, especially in refrigerated areas that are cleaned every 8-12 hours. In contrast, dry milk plants may only be wet cleaned once a month or every two months, and dry cleaning is less effective than wet cleaning. That’s why proper Listeria and Salmonella sample collection are key to food safety.
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