Document Detail


The Acetic Acid Tolerance Response induces cross-protection to salt stress in Salmonella typhimurium.
MedLine Citation:
PMID:  16842874     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Salmonella typhimurium induces an Acid Tolerance Response (ATR) upon exposure to mildly acidic conditions in order to protect itself against severe acid shock. This response can also induce cross-protection to other stresses such as heat and salt. We investigated whether both the acetic acid induced and lactic acid induced ATR in S. typhimurium provided cross-protection to a salt stress at 20 degrees C. Acid-adapted cells were challenged with both a sodium chloride (NaCl) and potassium chloride (KCl) shock and their ability to survive ascertained. Acetic acid adaptation provided cells with protection against both NaCl and KCl stress. However, lactic acid adaptation did not protect against either osmotic stressor and rendered cells hypersensitive to NaCl. These results have implications for the food industry where hurdle technology means multiple sub-lethal stresses such as mild pH and low salt are commonly used in the preservation of products.
Authors:
E J Greenacre; T F Brocklehurst
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-07-13
Journal Detail:
Title:  International journal of food microbiology     Volume:  112     ISSN:  0168-1605     ISO Abbreviation:  Int. J. Food Microbiol.     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-10-06     Completed Date:  2006-12-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8412849     Medline TA:  Int J Food Microbiol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  62-5     Citation Subset:  IM    
Affiliation:
Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA, UK. elizabeth.greenacre@bbsrc.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Acetic Acid / pharmacology*
Adaptation, Physiological
Food Microbiology
Food Preservation / methods*
Food Preservatives / pharmacology
Hydrogen-Ion Concentration
Potassium Chloride / pharmacology*
Salmonella typhimurium / physiology*
Sodium Chloride / pharmacology*
Chemical
Reg. No./Substance:
0/Food Preservatives; 64-19-7/Acetic Acid; 7447-40-7/Potassium Chloride; 7647-14-5/Sodium Chloride

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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