Decontamination of Chia and Flax Seed Inoculated with Salmonella and Surrogate, Enterococcus faecium NRRL B-2354, Using a Peracetic Acid Sanitizing Solution: Antimicrobial Efficacy and Impact on Seed Functionality

Journal of Food Protection
Rebecca K HyltonAmir M Hamidi

Abstract

Raw chia and flax seeds are increasingly associated with Salmonella contamination. However, intervention technologies for these seeds that maintain them in a raw state, without causing clumping because of mucilage production upon moisture exposure, are limited. In this study, a commercial ethanol and paracetic acid sanitizing solution meeting these criteria was evaluated for efficacy against Salmonella and Enterococcus faecium NRRL B-2354, a known Salmonella surrogate for thermal intervention technologies. Samples (100 g each) of chia and flax seeds ( n = 5) were inoculated with either a cocktail of Salmonella Newport, Senftenberg, Oranienburg, Saintpaul, Typhimurium DT104, and Cubana or E. faecium NRRL B-2354. After overnight acclimatization, samples were treated with 4 mL of sanitizing solution per sample and then held at ambient temperature (20 to 25°C) for 1 h before bacterial enumeration. Separate 1-kg-treated batches were evaluated for germination ability (4 replicates of 100-g samples), as well as nutrient content and rancidity ( n = 3), compared with untreated control. Following the posttreatment holding time, these batches were dried back to original moisture content at 70°C to evaporate residual sanitizing solution, t...Continue Reading

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Citations

Apr 3, 2021·Critical Reviews in Food Science and Nutrition·Nitin Dhowlaghar, Mei-Jun Zhu

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