Researchers at Processed Foods Research and Produce Safety and Microbiology units of Western Regional Research Center from the U.S. Department of Agriculture (USDA) investigated the effectiveness of the oils by incorporating them in thin, tomato-based antimicrobial coatings known as edible films. In addition to its flavor properties, tomatoes are reported to possess numerous beneficial nutritional and bioactive components that may benefit human health. Edible tomato films containing antimicrobials may protect food against contamination by pathogenic microorganisms.
According to researchers:
- Oregano oil consistently inhibited the growth of all three bacteria.
- Garlic oil was not effective against E. coli or Salmonella, but was effective against Listeria.
- Oregano and allspice oils were effective against E coli and Salmonella. Vapor tests of oregano and allspice oils indicated that these two oils diffuse more efficiently through the air than through direct contact with the bacteria.
- Listeria was less resistant to EO vapors while E. coli was more resistant.
Edible films for fruits and vegetables can serve as carriers for food additives including plant-derived, safe antimicrobials. The increased interest in antimicrobial films is the result of increased consumption of contaminated fresh-cut produce.
In a related study from the same USDA research group, it was found that cinnamon, allspice and clove might protect food from bacteria according to a study in the Journal of Food Science.
Steve - wouldn't you feel much more comfortable using these substances as opposed to irradiation, viral adulteration, chemical rinsing, etc.?
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