Document Detail


Residence time and food contact time effects on transfer of Salmonella Typhimurium from tile, wood and carpet: testing the five-second rule.
MedLine Citation:
PMID:  17381737     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIMS: Three experiments were conducted to determine the survival and transfer of Salmonella Typhimurium from wood, tile or carpet to bologna (sausage) and bread. METHODS AND RESULTS: Experiment 1. After 28 days, 1.5 to 2.5 log(10) CFU cm(-2) remained on tile from and the more concentrated media facilitated the survival of S. Typhimurium compared with the more dilute solutions. Experiments 2 and 3. The bacterial transfer rate to food decreased as the bacterial residence time on the surface increased from 2, 4, 8 to 24 h with transfers of 6.5, 4.8, 4.6 and 3.9 log CFU ml(-1) in the rinse solutions, respectively. Over 99% of bacterial cells were transferred from the tile to the bologna after 5 s of bologna exposure to tile. Transfer from carpet to bologna was very low (<0.5%) when compared with the transfer from wood and tile (5-68%). CONCLUSIONS: (i) Salmonella Typhimurium can survive for up to 4 weeks on dry surfaces in high-enough populations to be transferred to foods and (ii) S. Typhimurium can be transferred to the foods tested almost immediately on contact. SIGNIFICANCE AND IMPACT OF THE STUDY: This study demonstrated the ability of bacteria to survive and cross-contaminate other foods even after long periods of time on dry surfaces, thus reinforcing the importance of sanitation on food contact to minimize the risk of foodborne illness.
Authors:
P Dawson; I Han; M Cox; C Black; L Simmons
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of applied microbiology     Volume:  102     ISSN:  1364-5072     ISO Abbreviation:  J. Appl. Microbiol.     Publication Date:  2007 Apr 
Date Detail:
Created Date:  2007-03-26     Completed Date:  2007-09-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9706280     Medline TA:  J Appl Microbiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  945-53     Citation Subset:  IM    
Affiliation:
Department of Food Science and Human Nutrition, Clemson University, Clemson, SC 29634-0316, USA. pdawson@clemson.edu
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MeSH Terms
Descriptor/Qualifier:
Animals
Bacterial Adhesion*
Floors and Floorcoverings*
Food Contamination / analysis*
Food Handling
Food Microbiology*
Meat Products / microbiology*
Salmonella / growth & development*,  isolation & purification
Time Factors

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


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