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Biofilms on food contact materials represent public health issues because they are resistant to cleaning and disinfection. This study aims to assess the  Bacillus cereus  biofilm formation capacity on silicone, polyethylene terephthalate, Teflon, and aluminium food contact materials. The biofilm biomass was analysed with the crystal violet assay method. We used the standard strain  B. cereus  CCM 2010, wild strain  B. cereus  100 and spores of those two strains. The results show that both the vegetative form the bacteria and it spores form large amounts of biofilm on silicone, followed by polyethylene terephthalate, Teflon, and aluminium. More detailed analysis has shown that spores form more biomass on all materials in comparison to the vegetative form and that the standard strains form low levels of biofilm in contrast to the wild strains. Selecting proper material with the lowest biofilm formation potential can prevent or reduce food contamination and consequently increase food safety.

Biofilm formation capacity of Bacillus cereus on silicone, polyethylene terephthalate, Teflon, and aluminium food contact materials