Document Detail

Effects of heat, acid, and freeze-thaw challenges on survival of starved Vibrio parahaemolyticus in minimal salt medium, tryptic soy broth, and filtered oyster homogenate medium.
MedLine Citation:
PMID:  15222558     Owner:  NLM     Status:  MEDLINE    
Vibrio parahaemolyticus is a ubiquitous gram-negative enteropathogenic bacterium. To evaluate the risk of stress-adapted V. parahaemolyticus cells in food, we investigated the survivability of starvation-adapted and starvation-low salinity-adapted cells of this pathogen in different media against different stresses. Logarithmically grown bacterial cells were starved at 25 degrees C in a minimal salt medium with 0.5 or 3.0% NaCl for 24 h. Resistances against challenges of heat, acid, and freeze-thaw treatment exhibited by the starvation-adapted cells were similar to those exhibited by the starvation-low salinity-adapted cells but substantially higher than those of the unadapted control cells. The increased stress resistance of the adapted cells against freeze-thaw challenge was lower in tryptic soy broth than in the starving medium. Resistance of the adapted bacteria against heat and freeze-thaw treatment was completely eliminated in filter-sterilized oyster homogenate medium. Practically, these results help to assess the risk of stress-adapted V. parahaemolyticus in food.
H C Wong; C N Chang; M Y Chen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of food protection     Volume:  67     ISSN:  0362-028X     ISO Abbreviation:  J. Food Prot.     Publication Date:  2004 Jun 
Date Detail:
Created Date:  2004-06-29     Completed Date:  2004-09-02     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  7703944     Medline TA:  J Food Prot     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1243-6     Citation Subset:  IM    
Department of Microbiology, Soochow University, Taipei, Taiwan 111, Republic of China.
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MeSH Terms
Adaptation, Physiological*
Colony Count, Microbial
Culture Media
Food Handling / methods*
Food Microbiology*
Hot Temperature
Hydrogen-Ion Concentration
Time Factors
Vibrio parahaemolyticus / growth & development*,  physiology*
Reg. No./Substance:
0/Culture Media

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

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