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ARS Home Pacific West Area Albany, California Western Regional Research Center Healthy Processed Foods Research Research Publications at this Location





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- Rebecca Milczarek *(Scopus)*
- Yuzhu Zhang *(PubMed)*

Title:   Author  item
                                            ZHU, LIBIN - University Of Arizonaitem
                                            Olsen, Carlitem
                                            McHugh, Taraitem
                                            Friedman, Mendelitem
                                            JARONI, DIVYA - Oklahoma State Universityitem
                                            RAVISHANKAR, SADHANA - University Of Arizona
  Submitted to: Meeting Abstract
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 10/21/2013
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: The increased demand for organic leafy green may raise the risk of foodborne illness outbreaks due to consumption of contaminated produce. Edible films incorporated with natural antimicrobials have the potential to be used as ingredients into organic bagged salads to control  contamination from pathogenic bacteria.  The objective of this study was to investigate the antimicrobial effects of GRAS-listed carvacrol (the main ingredient of oregano oil) and cinnamaldehyde (the main ingredient of cinnamon oil) incorporated into apple, carrot and hibiscus-based edible films against Salmonella Newport in bagged organic leafy greens. The leafy greens tested included romaine and iceberg lettuce, and mature and baby spinach. Each leafy green sample was washed, dip inoculated with S. Newport (107 CFU/ml) and dried. Each sample was put into a Ziploc bag. Edible films pieces were then added into the bag and mixed well. The bags were sealed and stored at 4°C. Samples were taken at day 0, 3, and 7 for enumeration of survivors. On all leafy greens, the 3% carvacrol-containing films showed the  highest killing effects against the  bacteria. All 3 types of 3% carvacrol-containing films reduced Salmonella population by 5 log CFU/g at day 0. The 1.5% carvacrol-containing film reduced  Salmonella by 1-4 logs CFU/g at day 7.  Films with 3% cinnamaldehyde showed 0.5-3 log reductions on different leafy greens.  Films with 0.5 and 1.5% cinnamaldehyde and 0.5% carvacrol slightly reduced Salmonella population. In general, carvacrol films were more effective than cinnamaldehyde films. The vapors from the antimicrobials in the films  were most effective against Salmonella on iceberg lettuce. This study demonstrates the potential of edible films incorporated with carvacrol and cinnamaldehyde to inactivate S. Newport on organic leafy greens.


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