SIGNIFICANCE OF MICROBIAL BIOFILMS IN FOOD-INDUSTRY - A REVIEW

Biofilms have been of considerable interest in the context of food hyg iene. Of special significance is the ability of microorganisms to atta ch and grow on food and food-contact surfaces under favourable conditi ons. Biofilm formation is a dynamic process and different mechanisms a re involved in their attachment and growth. Extracellular polymeric su bstances play an important role in the attachment and colonization of microorganisms to food-contact surfaces. Various techniques have been adopted for the proper study and understanding of biofilm attachment a nd control. If the microorganisms from food-contact surfaces are not c ompletely removed, they may lead to biofilm formation and also increas e the biotransfer potential. Therefore, various preventive and control strategies like hygienic plant lay-out and design of equipment, choic e of materials, correct use and selection of detergents and disinfecta nts coupled with physical methods can be suitably applied for controll ing biofilm formation on food-contact surfaces. In addition, bacterioc ins and enzymes are gaining importance and have an unique potential in the food industry for the effective biocontrol and removal of biofilm s. These newer biocontrol strategies are considered important for the maintenance of biofilm-free systems, for quality and safety of foods. (C) 1998 Elsevier Science B.V.