Comparing the antimicrobial effectiveness of NaCl and KCl with a view to salt/sodium replacement.

A study using a small range of pathogenic bacterial species (Aeromonas hydrophila, Enterobacter sakazakii, Shigella flexneri, Yersinia enterocolitica and 3 strains of Staphylococcus aureus) has shown that potassium chloride has an equivalent antimicrobial effect on these organisms when calculated on a molar basis. Combined NaCl and KCl experiments were carried out and data was analysed using a modification to the Lambert and Lambert [Lambert, R.J.W., and Lambert, R., 2003. A model for the efficacy of combined inhibitors. Journal of Applied Microbiology 95, 734-743.] model for combined inhibitors and showed that in combination KCl is a direct 1:1 molar replacement for the antimicrobial effect of common salt. If this is a general finding then, where salt is used to help preserve a product, partial or complete replacement by KCl is possible.

[1]  R. Lambert,et al.  Disinfection kinetics: a new hypothesis and model for the tailing of log‐survivor/time curves , 2000, Journal of applied microbiology.

[2]  R. Lambert,et al.  A model for the efficacy of combined inhibitors , 2003, Journal of applied microbiology.

[3]  G. Nychas,et al.  Effect of NaCl and KCl on fate and growth/no growth interfaces of Listeria monocytogenes Scott A at different pH and nisin concentrations , 2007, Journal of applied microbiology.

[4]  J. Augustin,et al.  Modelling the growth rate of Listeria monocytogenes with a multiplicative type model including interactions between environmental factors. , 2000, International journal of food microbiology.

[5]  I. Astiasarán,et al.  Influence of partial replacement of NaCl with KCl and CaCl2on microbiological evolution of dry fermented sausages , 2001 .

[6]  Eva Bidlas,et al.  An investigation of the Gamma hypothesis: a predictive modelling study of the effect of combined inhibitors (salt, pH and weak acids) on the growth of Aeromonas hydrophila. , 2007, International journal of food microbiology.

[7]  I. Astiasarán,et al.  Influence of partial replacement of NaCl with KCl and CaCl(2) on texture and color of dry fermented sausages. , 1999, Journal of Agricultural and Food Chemistry.

[8]  L. Beuchat,et al.  Combined effects of water activity, solute, and temperature on the growth of Vibrio parahaemolyticus. , 1974, Applied microbiology.

[9]  I. Astiasarán,et al.  Influence of partial replacement of NaCl with KCl on lipid fraction of dry fermented sausages inoculated with a mixture of Lactobacillus plantarum and Staphylococcus carnosus. , 1996, Meat science.

[10]  M B Cole,et al.  An example of the stages in the development of a predictive mathematical model for microbial growth: the effects of NaCl, pH and temperature on the growth of Aeromonas hydrophila. , 1994, International journal of food microbiology.

[11]  Marcel H Zwietering,et al.  A Decision Support System for Prediction of the Microbial Spoilage in Foods. , 1992, Journal of food protection.

[12]  J P Guyonnet,et al.  Modelling the growth kinetics of Listeria as a function of temperature, pH and organic acid concentration. , 2002, International journal of food microbiology.

[13]  C. Duncan,et al.  Influence of Water Activity on the Growth of Clostridium perfringens , 1970, Applied microbiology.

[14]  R. Lambert,et al.  Susceptibility testing: accurate and reproducible minimum inhibitory concentration (MIC) and non‐inhibitory concentration (NIC) values , 2000, Journal of applied microbiology.

[15]  M H Zwietering,et al.  Application of predictive microbiology to estimate the number of Bacillus cereus in pasteurised milk at the point of consumption. , 1996, International journal of food microbiology.