DeVere Elizabeth, Purchase Diane
School of Health and Social Sciences, Middlesex University, Queensway, Middlesex EN3 4SA, UK.
Food Microbiol. 2007 Jun;24(4):425-30. doi: 10.1016/j.fm.2006.07.013. Epub 2006 Sep 27.
Four commercially available antibacterial products (two wipes and two sprays) were tested under laboratory conditions on a range of food contact surfaces (wood, glass, plastic, Microban incorporated plastic). The products' effectiveness at preventing cross-contamination of Escherichia coli and Staphylococcus aureus and the influence of surface type and drying time were assessed. Survival of the bacterial culture (approximately 400 colonies per 8 cm(2)) on the above preparation surfaces was determined using an in situ nitroblue tetrazolium (NBT) method. In the absence of any antibacterial products, both bacteria survived up to 120 min on all test surfaces with glass and plastic showing no reduction in bacterial number. The order of survival is: glass>plastic>>Microban incorporated plastic>wood (<8%). The length of drying time did not affect the survival of either bacterium on glass and plastic surfaces. On wood and Microban incorporated plastic, E. coli appeared to be more sensitive to drying time than S. aureus. Only plastic appeared to affect the effectiveness of the antibacterial products, where the reduction in bacterial number was significantly lower than the other test surfaces (p<0.05). The overall results suggest the antibacterial products are effective in disinfecting food preparing surfaces, provided products instructions are carefully followed.
在实验室条件下，对四种市售抗菌产品（两种擦拭巾和两种喷雾）在一系列食品接触表面（木材、玻璃、塑料、含Microban塑料）上进行了测试。评估了这些产品在预防大肠杆菌和金黄色葡萄球菌交叉污染方面的有效性以及表面类型和干燥时间的影响。使用原位硝基蓝四氮唑（NBT）方法测定上述制备表面上细菌培养物（每8平方厘米约400个菌落）的存活情况。在没有任何抗菌产品的情况下，两种细菌在所有测试表面上均存活长达120分钟，玻璃和塑料表面的细菌数量没有减少。存活顺序为：玻璃>塑料>>含Microban塑料>木材（<8%）。干燥时间的长短对玻璃和塑料表面上两种细菌的存活均无影响。在木材和含Microban塑料上，大肠杆菌似乎比金黄色葡萄球菌对干燥时间更敏感。只有塑料似乎会影响抗菌产品的有效性，其细菌数量的减少明显低于其他测试表面（p<0.05）。总体结果表明，只要严格按照产品说明使用，抗菌产品对食品制备表面具有消毒效果。
