Antilisterial effects of gravinol-s grape seed extract at low levels in aqueous media and its potential application as a produce wash

Journal of Food Protection
Bledar BishaAubrey Mendonca

Abstract

Grape seed extract (GSE) is a rich source of proanthocyanidins, a class of natural antioxidants reported to have wide-ranging bioactivity as anti-inflammatory, anticarcinogenic, and antimicrobial agents. The ability of GSE to rapidly inactivate Listeria monocytogenes in vitro and the generally recognized as safe status of GSE make this extract an attractive candidate for control of Listeria in or on foods. Previously, GSE has been used at relatively high concentrations (1%) in complex food matrices and in combination with other antimicrobials. We sought to characterize the antilisterial effects of a commercial GSE preparation (Gravinol-S) alone at much lower concentrations (0.00015 to 0.125%) in aqueous solution and to test its possible use as an antimicrobial wash for fresh produce surfaces. Based on broth microdilution tests, the MICs of GSE against L. monocytogenes Scott A and Listeria innocua ATCC 33090 were as low as 50 and 78 mug ml(-1), respectively. GSE was evaluated in 0.85% saline against live cells of L. innocua via flow cytometry, using propidium iodide as a probe for membrane integrity. At sub-MICs and after only 2 min of exposure, treatment with GSE caused rapid permeabilization and clumping of L. innocua, results...Continue Reading

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Citations

Sep 13, 2018·Journal of the Science of Food and Agriculture·Lynda Bouarab ChibaneNadia Oulahal
Apr 21, 2012·Journal of Food Science·Paul J SarnoskiSean F O'Keefe
Jan 29, 2013·FEMS Microbiology Letters·Carlo BisignanoGiuseppina Mandalari
Oct 5, 2017·Journal of Food Science and Technology·F J Vázquez-ArmentaJ F Ayala-Zavala
May 23, 2012·Foodborne Pathogens and Disease·Karin HoelzerSherri Dennis
Apr 19, 2011·Applied and Environmental Microbiology·Xiaowei Su, Doris H D'Souza
Apr 21, 2021·Food Microbiology·Snehal S Joshi, Doris H D'Souza
Aug 9, 2019·Journal of Agricultural and Food Chemistry·Yousef I HassanMoussa S Diarra

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