Combined washing effect of noni extract and oregano essential oil on the decontamination of Listeria monocytogenes on romaine lettuce,International Journal of Food Science & Technology

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Combined washing effect of noni extract and oregano essential oil on the decontamination of Listeria monocytogenes on romaine lettuce
International Journal of Food Science & Technology ( IF 2.6 ) Pub Date : 2020-06-25 , DOI: 10.1111/ijfs.14685
Ji‐Hoon Kang ₁ , Kyung Bin Song ₁

Affiliation

Combined washing effect of noni extract (NE) and oregano essential oil (OE) on the decontamination of Listeria monocytogenes on romaine lettuce was examined. The fractional inhibitory concentration index (FICI) between NE and three different essential oils (cinnamon leaf, thyme and OE) was determined. Fractional inhibitory concentration index results indicated that OE only had an additive effect (FICI = 1). Noni extract/oregano essential oil combined washing resulted in the greatest reduction in viable cell numbers (3.42 log CFU g⁻¹) relative to non‐washed samples. Furthermore, the combined washing was more effective than sodium hypochlorite washing in terms of reducing the microbial load (>1.44‐log reduction). Washing treatment did not change the surface colour or total phenolic content in lettuce samples. These results suggest that NE/OE combined washing is applicable as a novel decontamination treatment to ensure the microbial safety of romaine lettuce without changing the quality.

中文翻译：

诺丽提取物和牛至精油联合洗涤对生菜中单核细胞增生李斯特氏菌的去污作用

考察了诺丽提取物（NE）和牛至精油（OE）对生菜莴苣中单核细胞增生李斯特菌的去污效果。确定了NE和三种不同精油（肉桂叶，百里香和OE）之间的抑制分数浓度指数（FICI）。分数抑制浓度指数结果表明，OE仅具有累加作用（FICI = 1）。诺丽提取物/牛至精油联合洗涤可最大程度减少活细胞数量（3.42 log CFU g ^-1）相对于未清洗的样品。此外，在减少微生物负荷方面（> 1.44-log减少），联合洗涤比次氯酸钠洗涤更有效。洗涤处理不会改变生菜样品的表面颜色或总酚含量。这些结果表明，NE / OE组合洗涤可作为一种新型去污处理方法，以确保长叶莴苣的微生物安全性而不会改变质量。

更新日期：2020-06-25

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