Acid Resistance of Cronobacter sakazakii

Title
Acid Resistance of Cronobacter sakazakii
Author(s)
방우석장성란[장성란]
Keywords
ESCHERICHIA-COLI O157-H7; POWDERED INFANT FORMULA; ENVIRONMENTAL-STRESS RESPONSES; ENTEROBACTER-SAKAZAKII; TOLERANCE RESPONSE; SALMONELLA-TYPHIMURIUM; LISTERIA-MONOCYTOGENES; LOW PH; CROSS-PROTECTION; SURVIVAL
Issue Date
201108
Publisher
KOREAN SOC FOOD SCIENCE ANIMAL RESOURCES
Citation
KOREAN JOURNAL FOR FOOD SCIENCE OF ANIMAL RESOURCES, v.31, no.4, pp.551 - 556
Abstract
The objective of this study was to determine the resistance of Cronobacter sakazakii in acidic environments. The D-values of CAFM2 (ATCC 29544), EB 1, EB 5, and EB 41 at pH 2.5 in TSB were significantly (p < 0.05) higher when cells were adapted at pH 4.5 in TSB for 5-h then when cells were not adapted at pH 4.5 in TSB. The D-values of CAFM2, EB I, and EB 41 at pH 2.5 in TSB were significantly (p < 0.05) higher when cells were adapted at pH 4.5 in TSB for 10-h then when cells were not adapted at pH 4.5 in TSB. The D-values of CAFM2 and EB1 at pH 2.5 in TSB were significantly (p < 0.05) higher when cells were adapted at pH 4.5 in TSB for 24-h then when cells were not adapted at pH 4.5 in TSB. The adaptation of C. sakazakii to mild acidic environments may result in increased resistance to severe acidic environments. The D-values of all test strains at pH 2.5 in TSB were significantly (p < 0.05) higher when cells were cultured at pH 4.5 then when they were cultured at pH 7.2 in TSB. These data indicate that cells cultured in mildly acidic environments may result in increased resistance to severe acidic environments. The acid adaptation of C. sakazakii showed an increased resistance to acidic environments. The acid adaptation response of C. sakazakii has important implications for food safety, which should be considered when food preservation measures are developed.
URI
http://hdl.handle.net/YU.REPOSITORY/24768
ISSN
1225-8563
Appears in Collections:
생활과학대학 > 식품영양학과 > Articles
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