Abstract
Sales of commercial foods intended to be stored chilled are presently increasing by more than 10% per annum, with more than 109 packs sold annually in the UK alone. This review considers the potential for growth and toxin formation by non-proteolytic Clostridium botulinum, a dangerous foodborne pathogen, in short shelf-life (≤10 days) commercial chilled foods. The data show that large quantities of these foods have been sold without causing foodborne botulism. However, non-proteolytic C. botulinum can grow and form toxin in ≤10 days at ≤8 °C in foods/food materials in laboratory tests. It is suggested that this paradox indicates that the safety of some chilled foods may rely on one or more “unquantified controlling factors”. Better understanding of the magnitude and variability of the controlling factors associated with different types of foods would aid continued safe development of commercial foods designed to be stored chilled.
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