Preventing contamination of food surfaces by using specific cleaners and by following accurate sanitation procedures that can be easily adopted by any food and beverage producer.
李斯特氏病是由单核细胞增生李斯特菌的感染引起的，这是一种在土壤，植物和水中具有自然栖息地的微生物。如果通过受污染的食物大量摄入，这种细菌会给人类带来非常严重的后果，尤其是对孕妇及其胎儿和免疫功能低下的人。
危险的摄入不仅与新鲜食品有关，例如第四范围的沙拉。在> 65°C时烹饪和巴氏杀菌杀死李斯特菌。但是，在包装之前，经常在热处理后进行重新污染。此外，与其他负责食源性感染的微生物不同，李斯特菌耐受高浓度的盐，即使在2-4°C下也可以繁殖。
因为李斯特菌的耐药性及其高mortality among immunocompromised people, national authorities have placed serious limits on its presence in foodstuffs. In particularly, for foods imported into the United States, there is no tolerance for positivity of this microorganism. Producers of batches found positive at customs must destroy the goods at their own expense and are placed on an export ban lists that can become perennial in case of recurrence.
问题……解决方案
为了避免生产李斯特菌污染的食物，在任何情况下都限制其发展（欧洲立法允许根据食物的类型进行一定数量），GMP必须严格应用于食品工业。特别是关于原材料的卫生，与食物接触的表面以及对分配中心的温度控制。
此外，必须注意处理水，例如在第四范围的蔬菜中。因此，表面卫生的绝对重要性与李斯特菌产生生物膜的能力的并发症。如今，大多数解决来自生物膜的食物污染问题的建议旨在防止其成熟和实现这种尺寸，从而导致生物膜的某种爆炸。但是，这种生物膜发育模型现在已经过时了，因为众所周知，某些微生物细胞不断离开生物膜并最终污染食物。
因此，预防微生物粘附是对生物膜及其后果的最重要保护。有必要考虑促进粘附的底物特性：表面的缺陷，不规则性等；表面上存在有机分子和离子。除了最大程度地提高植物工程的护理以避免表面不规则性，死区域用于洗涤溶液的流动外，必须专注于清洁和消毒程序，考虑到几个因素。
如果微生物具有有机物质和矿藏的痕迹，可以将自己锚定在表面上。只有充分的隔离和表面活性剂激活的清洁溶液阻止了上述沉积物，从而阻止了生物膜形成的发作。用简单的苛性溶液进行的洗涤无法从表面清除无机残基的能力。
It is essential to prevent the contamination of food surfaces by specific cleaners and by following sanitation procedures that can be easily adopted by any food and beverage producer. AEB offer a wide range of solutions conceived to prevent the adhesion of microorganisms to the surfaces (first step of biofilm development). Dairy MPV, Dairy MP1, X5 S/S are caustic products for CIP applications rich in organic sequestering agents that chelate calcium avoiding the deposition of its salts as well avoiding the use by microorganisms of its cations to create anchor bridges on surfaces.
Dairy MPV and Dairy MP1 are suitable for Dairy plants while X5 S/S is suitable for all the other CIP applications. Removil EPS is an enzymatic powder able to solve the polysaccharidic layer (EPS) that protect microorganism living inside a biofilm from the action of detergents and disinfectants. This product can also be adopted for diagnostic of biofilm presence on surfaces. AEB Technical Service is available to suggest the best procedures to implement to minimize any Listeria and biofilm caused contamination.
