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Combination of ultraviolet light‐C and clove essential oil to inactivate Salmonella Typhimurium biofilms on stainless steel
Journal of Food Safety ( IF 1.9 ) Pub Date : 2020-03-11 , DOI: 10.1111/jfs.12788
Brenda A. Silva‐Espinoza 1 , Julian J. Palomares‐Navarro 1 , Melvin R. Tapia‐Rodriguez 1 , Manuel R. Cruz‐Valenzuela 1 , Gustavo A. González‐Aguilar 1 , Erika Silva‐Campa 2 , Martín Pedroza‐Montero 2 , Monica Almeida‐Lopes 3 , Raquel Miranda 3 , Jesus F. Ayala‐Zavala 1
Affiliation  

Salmonella typhimurium is able to form biofilms as a resistance mechanism against antimicrobials; therefore, it represents a problem for assuring food safety and highlights the importance of research on anti‐biofilm technologies. In this study, S. typhimurium biofilms were inactivated with the combination of clove essential oil (CEO) and ultraviolet light (UV‐C). The volatile composition of the CEO determined by gas chromatography showed eugenol as the major constituent (82%). A combination of CEO with UV‐C achieved a complete bacterial reduction (6.8 log/cm2) on biofilms with doses of 1.2 mg/ml and 76.41 mJ/cm2, respectively. Individually, the CEO at 1.2 mg/ml caused a reduction of 1.8 log CFU/cm2 of attached bacteria cells on stainless steel, while UV‐C individually used at 620.4 mJ/cm2 caused a 2.9 log CFU/cm2 reduction compared to control biofilms. In conclusion, this study demonstrated a synergistic effect of combining CEO and UV‐C irradiation to inactivate biofilms of S. typhimurium.

中文翻译:

紫外线C和丁香精油的组合可灭活不锈钢上的鼠伤寒沙门氏菌生物膜

鼠伤寒沙门氏菌能够形成生物膜,作为对抗菌素的耐药机制。因此,它代表了确保食品安全的问题,并突出了抗生物膜技术研究的重要性。在这项研究中,鼠伤寒沙门氏菌生物膜通过丁香精油(CEO)和紫外线(UV-C)的结合而失活。通过气相色谱测定的CEO的挥发性成分显示丁子香酚为主要成分(82%)。CEO与UV-C的组合分别以1.2 mg / ml和76.41 mJ / cm 2的剂量实现了生物膜上细菌的完全减少(6.8 log / cm 2)。单独地,首席执行官以1.2 mg / ml的剂量会降低1.8 log CFU / cm 2在不锈钢上附着细菌细胞的数量,而单独使用的UV-C浓度为620.4 mJ / cm 2,则与对照生物膜相比可降低2.9 log CFU / cm 2。总而言之,这项研究证明了将CEO和UV-C辐照结合以灭活鼠伤寒沙门氏菌生物膜具有协同作用。
更新日期:2020-03-11
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