Document Detail

Antimicrobial effects of corn zein films impregnated with nisin, lauric acid, and EDTA.
MedLine Citation:
PMID:  11403145     Owner:  NLM     Status:  MEDLINE    
Bacterial growth during food transport and storage is a problem that may be addressed with packaging materials that release antimicrobials during food contact. In a series of five experiments, EDTA, lauric acid (LA), nisin, and combinations of the three antimicrobial agents were incorporated into a corn zein film and exposed to broth cultures of Listeria monocytogenes and Salmonella Enteritidis for 48 h (sampled at 2, 4, 8, 12, 24, and 48 h). Four experiments used starting cultures of 10(8) CFU/ml in separate experiments tested against each bacterium; the fifth experiment examined the inhibitory effect of selected antimicrobial agents on Salmonella Enteritidis with an initial inoculum of 10(4) CFU/ml. L. monocytogenes cell numbers decreased by greater than 4 logs after 48 h of exposure to films containing LA and nisin alone. No cells were detected for L. monocytogenes (8-log reduction) after 24-h exposure to any film combination that included LA. Of all film agent combinations tested, none had greater than a 1-log reduction of Salmonella Enteritidis when a 10(8)-CFU/ml broth culture was used. When a 10(4) CFU/ml of Salmonella Enteritidis initial inoculum was used, the films with EDTA and LA and EDTA, LA, and nisin were bacteriostatic. However, there was a 5-log increase in cells exposed to control within 24 h. The results demonstrate bacteriocidal and bacteriostatic activity of films containing antimicrobial agents.
K L Hoffman; I Y Han; P L Dawson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of food protection     Volume:  64     ISSN:  0362-028X     ISO Abbreviation:  J. Food Prot.     Publication Date:  2001 Jun 
Date Detail:
Created Date:  2001-06-13     Completed Date:  2001-10-25     Revised Date:  2005-11-17    
Medline Journal Info:
Nlm Unique ID:  7703944     Medline TA:  J Food Prot     Country:  United States    
Other Details:
Languages:  eng     Pagination:  885-9     Citation Subset:  IM    
Department of Food Science and Human Nutrition, Clemson University, South Carolina 29634-0371, USA.
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MeSH Terms
Anti-Bacterial Agents / pharmacology*
Colony Count, Microbial
Drug Combinations
Drug Synergism
Edetic Acid / pharmacology
Food Additives
Lauric Acids / pharmacology
Listeria monocytogenes / drug effects*,  growth & development
Nisin / pharmacology
Salmonella enteritidis / drug effects*,  growth & development
Time Factors
Reg. No./Substance:
0/Anti-Bacterial Agents; 0/Drug Combinations; 0/Food Additives; 0/Lauric Acids; 1414-45-5/Nisin; 143-07-7/lauric acid; 60-00-4/Edetic Acid

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

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