Abstract
A model for ‘blown pack’ probability (BPP) caused by spores of C.estertheticum DSM8809 and C.algidicarnis, was developed as a function of vacuum packaging variables: storage temperature(ST:-2, 2, 4 and 15°C), vacuum level(VL:6 and 9mBar) and heat shrink temperature(HST:83 and 87°C). Beef meat pieces, were inoculated with spore suspensions individually at 102spores/cm2, packed and daily monitored up to 90 days. The lower BPP, estimated by the log-logistic model, for C.algidicarnis was 0.8% at:-1.5°C/6mBar/87°C while for C.estertheticum was 99.13% at the same conditions. For both organisms, tested variables were unable to eliminate the risk of blown packaged spoilage, at 102spores/cm2 contamination level.
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