Buder Celine, Langkabel Nina, Kirse Alina, Kalusa Mirjam, Fietz Simone A, Meemken Diana
Institute of Food Safety and Food Hygiene, Working Group Meat Hygiene, School of Veterinary Medicine, Freie Universität Berlin, 14163, Berlin, Germany.
Veterinary Centre for Resistance Research, School of Veterinary Medicine, Freie Universität Berlin, 14163, Berlin, Germany.
Folia Microbiol (Praha). 2025 Feb 4. doi: 10.1007/s12223-025-01243-x.
A recently discovered source for infection of slaughter pigs, and thus entry for bacteria into the food chain, is the installed drinking equipment in lairage pens of pig abattoirs. To mitigate this, nano-coating of stainless steel, currently used in human medicine fields as well as in other parts of the food chain, appears as promising technology. In this study, silicon dioxide nano-coating was applied to six drinkers and installed for one and three months in a lairage of a pig abattoir, while results were compared with those of drinkers that had not been nano-coated. Laboratory examination of eight sample types related to the drinkers was conducted for total aerobic plate count, Enterobacteriaceae count, Pseudomonas spp. count, Salmonella presence, pathogenic Yersinia enterocolitica presence, Listeria monocytogenes presence and methicillin-resistant Staphylococcus aureus presence. The nipple drinker, which the pigs take into their mouth for drinking, was then examined using scanning electron microscopy and elemental analysis. The nano-coating did not produce statistically significant reductions in the loads or presence of these bacteria compared to the same but uncoated drinking equipment used under the same conditions. Further studies should focus on the implementation of combined methods, such as nano-coating and sanitary treatment, as well as modifications to the coating itself, to produce meaningful reductions of the bacterial loads on/in abattoir lairage drinking equipment.
近期发现，屠宰场猪栏中安装的饮水设备是感染屠宰猪从而使细菌进入食物链的一个源头。为缓解这一问题，目前在人类医学领域以及食物链其他环节使用的不锈钢纳米涂层似乎是一项很有前景的技术。在本研究中，将二氧化硅纳米涂层应用于六个饮水器，并在一家猪屠宰场的待宰圈中安装了一个月和三个月，同时将结果与未进行纳米涂层处理的饮水器进行比较。对与饮水器相关的八种样本类型进行了实验室检测，检测项目包括需氧平板计数、肠杆菌科计数、假单胞菌属计数、沙门氏菌存在情况、致病性小肠结肠炎耶尔森菌存在情况、单核细胞增生李斯特菌存在情况以及耐甲氧西林金黄色葡萄球菌存在情况。然后，使用扫描电子显微镜和元素分析对猪用来饮水的乳头式饮水器进行了检查。与在相同条件下使用的未涂层饮水设备相比，纳米涂层在这些细菌的负荷或存在情况方面并未产生具有统计学意义的降低。进一步的研究应侧重于实施纳米涂层与卫生处理等联合方法，以及对涂层本身进行改进，以切实降低屠宰场待宰圈饮水设备上/内的细菌负荷。
