Czech J. Food Sci., 2003, 21(6):203-209 | DOI: 10.17221/3499-CJFS

Effect of pH and water activity on the growth of Arcobacter sp. in culture

L. Červenka, I. Zachová, P. Minříková, J. Vytřasová
1 Department of Analytical Chemistry and
2 Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic

The effect was studied of pH value and water activity (aw) on the growth of Arcobacter butzleri and Arcobacter cryaerophilus in culture media at 30°C. Various weak organic acids were used to achieve target pH, and different humectants were used to control aw. Generally, the growth of arcobacters was inhibited at medium pH. Compared to propionic, lactic, malic and ascorbic acids (pH 5.5-5.0), formic, citric and tartaric acids in the pH range of 6.0-5.5 were more inhibitory to both arcobacter species. Both arcobacter strains were extremely sensitive to broth environment with aw values of < 0.980 using NaCl, glycerol and sucrose as humectants. This sensitivity to aw and pH may well be an important constraint for the distribution and survival of Arcobacter sp. in the environment, particularly in foods and food products.

Keywords: Arcobacter sp.; weak organic acids; water activity

Published: December 31, 2003  Show citation

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Červenka L, Zachová I, Minříková P, Vytřasová J. Effect of pH and water activity on the growth of Arcobacter sp. in culture. Czech J. Food Sci. 2003;21(6):203-209. doi: 10.17221/3499-CJFS.
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