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Reduction in microbial survival on food contact surfaces by a spray coated polymerized quaternary ammonium compound.
Food Science & Nutrition ( IF 3.9 ) Pub Date : 2020-03-24 , DOI: 10.1002/fsn3.1537
Jaesung Lee 1 , Melvin A Pascall 1
Affiliation  

Using polymerization and immobilization techniques, the loss of antimicrobial efficacy of a quaternary ammonium compound (QAC) was minimized by decreasing its solubility and crosslinking it to metal substrates. The survivability of Listeria innocua and Escherichia coli K12 inoculated to silane QAC coated metal surfaces was compared with uncoated metal surfaces at different treatment conditions for up to 6 months storage. Resilience of the coating material to repeated cleaning, up to 20 washing and rinsing cycles, was also investigated. No evidence of bacteria viability (>5 log reduction of colony‐forming unit) was observed for L. innocua when they were inoculated onto coated surfaces stored for 3 months, whereas E. coli was reduced by 3 to 4‐logs. For the viable L. innocua cells on the coated surfaces, >5 log reductions were achieved even after the coated surfaces were cleaned by 20 washing and rinsing cycles prior to the cells’ inoculation. For the E. coli cells, ~ 2 log reductions were achieved after 5 cleaning cycles and <1 log reduction after 10 or more cleaning procedures. Overall, the results showed that the coating had antimicrobial activity against Gram‐positive bacteria while it showed moderate activity to Gram‐negative bacteria.

中文翻译:

喷涂聚合的季铵化合物可降低食品接触表面上的微生物存活率。

使用聚合和固定化技术,可通过降低其溶解度并将其交联到金属基材上来最大程度地降低季铵化合物(QAC)的抗微生物功效。在不同的处理条件下,将接种于硅烷QAC涂层金属表面的无毒李斯特菌大肠杆菌K12的生存能力与未涂层金属表面进行了长达6个月的保存比较。还研究了涂层材料对多达20次洗涤和漂洗循环进行重复清洁的弹性。当将无毒李斯特菌接种到存放了3个月的涂层表面上时,没有发现细菌活力(菌落形成单位减少> 5 log的证据)减少了3到4对数。对于在包被的表面上的活的无毒李斯特菌细胞,即使在接种细胞之前通过20个洗涤和漂洗周期清洗了包被的表面之后,也实现了> 5 log的减少。对于大肠杆菌细胞,在5个清洗周期后约减少2 log,在10个或更多清洗程序后减少<1 log。总体而言,结果表明该涂层对革兰氏阳性细菌具有抗菌活性,而对革兰氏阴性细菌则具有中等活性。
更新日期:2020-03-24
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