Thermal inactivation of Enterococcus faecium

Vladimiír Špelina, Ljuba Schlemmerová, Aleš Landfeld, Karel Kýhos, Pavel Měřička and Milan Houška
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Vladimiír Špelina: National Institute of Public Health, Prague, Czech Republic
Ljuba Schlemmerová: National Institute of Public Health, Prague, Czech Republic
Aleš Landfeld: Food Research Institute Prague, Prague, Czech Republic
Karel Kýhos: Food Research Institute Prague, Prague, Czech Republic
Pavel Měřička: Teaching Hospital Hradec Králové, Hradec Králové, Czech Republic
Milan Houška: Food Research Institute Prague, Prague, Czech Republic

Czech Journal of Food Sciences, 2007, vol. 25, issue 5, 283-290

Abstract: Data for thermal inactivation of working suspension of Enterococcus faecium in model solutions were acquired and used to develop a mathematical model for thermal inactivation of the bacterium. The model is valid within the water activity range 0.97 to 0.99; pH range 6.0 to 7.6; temperature range 60°C to 65°C, and was determined for the microorganism concentration ranges of 102 per ml to 108 per ml of the model inactivation solution. An Excel procedure was developed in Visual Basic language which enables the calculation of the final concentration of the microorganism from the input data for pH, aw, logN0, temperature, and holding time of the treatment. The proposed model was verified in experiments using cow and human milks. With cow milk, the correspondence between the experimental and the predicted data is highly satisfactory. With human milk, the model predicts a smaller effect of heating than is that manifested experimentally.

Keywords: thermal inactivation model; Enterococcus faecium; verification (search for similar items in EconPapers)
Date: 2007
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:25:y:2007:i:5:id:682-cjfs

DOI: 10.17221/682-CJFS

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