| Bactericidal Activities of Health-Promoting, Food-Derived Powders Against the Foodborne Pathogens Escherichia coli, Listeria monocytogenes, Salmonella enterica, and Staphylococcus aureus. | |
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MedLine Citation:
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PMID: 23317422 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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We evaluated the relative bactericidal activities (BA(50) ) of 10 presumed health-promoting food-based powders (nutraceuticals) and, for comparison, selected known components against the following foodborne pathogens: Escherichia coli O157:H7, Salmonella enterica, Listeria monocytogenes, and Staphylococcus aureus. The relative activities were evaluated using quantitative bactericidal activity [(BA(50) value, defined as the percentage of the sample in the assay mixture that resulted in a 50% decrease in colony forming units]. The BA(50) values were determined by fitting the data to a sigmoidal curve by regression analysis using concentration-antimicrobial response data. Antimicrobial activity is indicated by a low BA(50) value; meaning less material is needed to kill 50% of the bacteria. Olive pomace, olive juice powder, and oregano leaves were active against all 4 pathogens, suggesting that they behave as broad-spectrum antimicrobials. All powders exhibited strong antimicrobial activity against S. aureus. The following powders showed exceptionally high activity against S. aureus (as indicated by the low BA(50) values shown in parentheses): apple skin extract (0.002%); olive pomace (0.008%); and grape seed extract (0.016%). Listeria bacteria were also highly susceptible to apple skin extract (0.007%). The most active substances provide candidates for the evaluation of antimicrobial effectiveness in human food and animal feed. Practical Application: Plant-derived health-promoting food supplements, high in bioactive compounds, are candidates for use as antimicrobials in food. |
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Authors:
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Mendel Friedman; Philip R Henika; Carol E Levin |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-1-14 |
Journal Detail:
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Title: Journal of food science Volume: - ISSN: 1750-3841 ISO Abbreviation: J. Food Sci. Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-1-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0014052 Medline TA: J Food Sci Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Journal of Food Science © 2013 Institute of Food Technologists® No claim to original US government works. |
Affiliation:
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Authors are with Western Regional Research Center, Agricultural Research Service-USDA, Produce Safety and Microbiology Research Unit, Albany, CA 94710, U.S.A. Direct inquires to author Friedman (E-mail: mendel.friedman@ars.usda.gov). |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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