Abstract
Food spoilage and microbial contamination require attention during the food production process since the presence of these bacteria can create problems including the formation of biofilms produced by these bacteria. Biofilm formations are initiated through cell-to-cell communication which is called quorum sensing mechanism. Hence, inhibition of this communication mechanism could be one of the solutions to inhibit biofilm formation. Therefore, exploration of bioactive compounds from various sources including hyllosphere bacteria with anti-quorum sensing inhibition activities is important. Phyllosphere bacteria are a community of bacteria found on the surface of plant leaves at a very large population. These bacteria can produce bioactive compounds that can inhibit quorum sensing mechanism. In this study, 54 phyllosphere bacteria isolates were tested, 8 bacterial isolates had potential effect to inhibit quorum sensing. From biofilm inhibition assay, the highest percentages were showed by ifferent phyllosphere isolates against each pathogen. Whereas, for biofilm destruction assay, JB 8F isolate had the highest percentage of destruction biofilm activity against biofilm formed by Bacillus cereus and Shewanella putrefaciens. Eight isolates of phyllosphere bacteria had the potential as quorum quencher and anti-biofilm agents, both for inhibition and destruction of biofilm.
Highlights
IntroductionFood quality and safety must be considered when making food products
Introduction includeBacillus cereus, Bacillus subtilis, and Shewanella putrefaciens
The results revealed that the Detection of anti-quorum sensing activity The crude extracts of 8 out of 54 phyllosphere bacterial isolates gave positive results
Summary
Food quality and safety must be considered when making food products This lack of attention can cause food contamination and spoilage, causing illness in people. Biofilms can be found on food or on the surface of food production equipment that causing food spoilage (Zhang et al 2009). Bacteria that can cause food spoilage could contaminate the food production equipment pipelines by forming biofilms. This bacteria can cause food poisoning by producing enterotoxins and emetic toxins (Lindsay et al 2006; Voort and Abee 2009). Bacillus subtilis can produce biofilms when hot fluids continuously flow over a surface and contaminate dairy products (Lindsay et al 2006). S. putrefaciens can cause food poisoning by production of neurotoxins, called tetrodotoxin
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