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      Biofilm formation by Salmonella spp. on food contact surfaces and their sensitivity to sanitizers

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      International Journal of Food Microbiology

      Elsevier BV

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          Abstract

          Biofilm formation by two poultry isolates of Salmonella on three commonly used food contact surfaces viz plastic, cement and stainless steel were studied. Biofilm formation of both the isolates showed a similar trend with the highest density being on plastic followed by cement and steel. Salmonella weltevreden formed biofilm with a cell density of 3.4 x 10(7), 1.57 x 10(6) and 3 x 10(5) cfu/cm2 on plastic, cement and steel respectively while Salmonella FCM 40 biofilm on plastic, cement and steel were of the order of 1.2 x 10(7), 4.96 x 10(6) and 2.23 x 10(5) cfu/cm2 respectively. The sensitivity of the biofilm cells grown on these surfaces to different levels of two sanitizers namely hypochlorite and iodophor for varying exposure times was studied. Biofilm cells offered greater resistance when compared to their planktonic counterparts. Such biofilm cells in a food processing unit are not usually removed by the normal cleaning procedure and therefore could be a source of contamination of foods coming in contact with such surfaces.

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          Author and article information

          Journal
          International Journal of Food Microbiology
          International Journal of Food Microbiology
          Elsevier BV
          01681605
          March 2001
          March 2001
          : 64
          : 3
          : 367-372
          Article
          10.1016/S0168-1605(00)00466-9
          11294359
          © 2001

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