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Published on: November 9, 2016
Effect of Initial O2 and CO2 and Low-Dose Irradiation on Toxin Production by Clostridium botulinum in MAP Fresh Pork
Anne D Lambert1, James P Smith1, Karen L Dodds2
1McGill University, Department of Food Science & Agricultural Chemistry, 21,111 Lakeshore Road, Ste-Anne-de-Bellevue, Quebec, H9X 1C0.
Abstract:
The effects of irradiation, initial O2, initial CO2 and the presence of an O2 and CO2 absorbent on toxin production by Clostridium botulinum in inoculated pork stored at 15°C were studied using a factorial experiment. Toxin production occurred faster in samples initially packaged with 20% O2, compared to samples packaged with 100% N2. The presence of CO2 in the package headspace was not a significant factor affecting time until toxin detection. Irradiation was significant in delaying the time until toxin detection in samples initially packaged with 20% O2 but not in other treatments. Sensory rejection, based primarily on discoloration, occurred within 7 to 14 d, irrespective of treatment. All samples were spoiled before they became toxic.
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