Food Sensing: Detection of <i>Bacillus cereus</i> Spores in Dairy Products
Jasmina Vidic | Carole Chaix | Marisa Manzano | Marc Heyndrickx
Milk is a source of essential nutrients for infants and adults, and its production has increased worldwide over the past years. Despite developments in the dairy industry, premature spoilage of milk due to the contamination by <i>Bacillus cereus</i> continues to be a problem and causes considerable economic losses. <i>B. cereus</i> is ubiquitously present in nature and can contaminate milk through a variety of means from the farm to the processing plant, during transport or distribution. There is a need to detect and quantify spores directly in food samples, because <i>B. cereus</i> might be present in food only in the sporulated form. Traditional microbiological detection methods used in dairy industries to detect spores show limits of time (they are time consuming), efficiency and sensitivity. The low level of <i>B. cereus</i> spores in milk implies that highly sensitive detection methods should be applied for dairy products screening for spore contamination. This review describes the advantages and disadvantages of classical microbiological methods used to detect <i>B. cereus</i> spores in milk and milk products, related to novel methods based on molecular biology, biosensors and nanotechnology.
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