Document Detail

Resuscitation of acid-injured Salmonella in enrichment broth, in apple juice and on the surfaces of fresh-cut cucumber and apple.
MedLine Citation:
PMID:  16305675     Owner:  NLM     Status:  MEDLINE    
AIMS: To investigate the resuscitation of acid-injured Salmonella enterica in selected enrichment broths, in apple juice and on cut surfaces of apple and cucumber slices. METHODS AND RESULTS: Following exposure to 2.4% acetic acid for 7 min, S. enterica (serovars Mbandaka, Chester and Newport) cells were used to inoculate enrichment broths, phosphate-buffered saline (PBS), apple juice and fruit slices. Injured Salmonella cells resuscitated and regained the ability to form colonies on selective agar (Xylose-Lysine-Tergitol 4) if they were incubated in lactose broth (LB), universal pre-enrichment broth (UPB) or buffered peptone water (BPW), but not in tetrathionate broth, PBS or apple juice. The resuscitation occurred at a significantly (P > 0.05) faster rate in UPB than in LB or BPW. The resuscitation also occurred on the surfaces of fresh-cut cucumber at 20 degrees C, but not at 4 degrees C. CONCLUSIONS: Acid-injured Salmonella cells resuscitated in nonselective enrichment broths at different rates, but not in selective enrichment broth, apple juice, PBS or on fresh-cut apple. SIGNIFICANCE AND IMPACT OF THE STUDY: Pre-enrichment of food samples in UPB prior to selective enrichment is recommended. Injured Salmonella cells have the ability to resuscitate on fresh-cut surfaces of cucumber when stored at abusive temperatures.
C-H Liao; W F Fett
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Letters in applied microbiology     Volume:  41     ISSN:  0266-8254     ISO Abbreviation:  Lett. Appl. Microbiol.     Publication Date:  2005  
Date Detail:
Created Date:  2005-11-24     Completed Date:  2006-02-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8510094     Medline TA:  Lett Appl Microbiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  487-92     Citation Subset:  IM    
Eastern Regional Research Center, Agricultural Research Service, US Department of Agriculture, Wyndmoor, PA 19038, USA.
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MeSH Terms
Acids / pharmacology
Cucumis sativus / chemistry*,  microbiology
Culture Media
Food Microbiology
Malus / chemistry*,  microbiology
Salmonella / drug effects,  genetics,  physiology*
Reg. No./Substance:
0/Acids; 0/Culture Media

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