A predictive model of growth from spores of non-proteolytic Clostridium botulinum in the presence of different CO₂concentrations as influenced by chill temperature, pH and NaCl

Authors: Fernandez P.S.; Baranyi J.; Peck M.W.

Source: Food Microbiology, Volume 18, Number 4, August 2001 , pp. 453-461(9)

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Abstract:

In the present study, the effect of modified atmospheres ranging from 0–90%CO₂(balance 10% H₂and N₂) was evaluated on growth from spores of non-proteolyticClostridium botulinum (types B, E and F), at different pH and NaCl concentrations, over the temperature range 5–12°C. Growth tests were carried out using a model broth system, PYGS (peptone, yeast, glucose, starch). In general terms, a CO₂concentration of 5% enhanced growth, 50% CO₂showed a moderate inhibition and 90% had a considerable inhibitory effect. A predictive model has been developed that describes the effect of CO₂, in combination with other mild preservative factors, on growth from spores of non-proteolytic C. botulinum. The model provides a good description of the experimental data. Copyright 2001 Academic Press.

Language: English

Document Type: Research article

Affiliations: Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA, UK

Publication date: 2001-08-01