The adherence of Pseudomonas fluorescens to marble, granite, synthetic polymers, and stainless steel

Food Science and Technology (Campinas)

Roberta Torres Careli²  Nelio José Andrade²  Nilda Fatima Soares²  José Ivo Ribeiro Júnior¹  Marcilía Santos Rosado²  Patrícia Campos Bernardes² 

[1],Universidade Federal de Viçosa Laboratório de Higiene e Microbiologia de Alimentos Departamento de Tecnologia de AlimentosViçosa MG ,Brasil

关键词: bacterial adherence;    Pseudomonas fluorescens;    marble;    granite;    synthetic polymers;    stainless steel;    adesão bacteriana;    Pseudomonas fluorescens;    granito;    mármore;    polímeros;    aço inoxidável bacterial;   

DOI  :  10.1590/S0101-20612009000100026

来源: SciELO

【 摘 要 】

The adherence of Pseudomonas fluorescens cells to nine food-processing contact surfaces was evaluated using the plate-count method. The surfaces include marble, granite, stainless steel, polyvinyl chloride, polyurethane, and silicone-coated cloth, which have been used only in a few studies concerning bacterial adherence. The number of cells adhered to the surfaces increased with contact time reaching 5.0-6.1 log CDM.cm-2 after 10 hours, which can be considered a well established adherence process. The number of adhered cells doubled in 29.5 minutes and 23.5 minutes on stainless steel and thin polyvinyl chloride-coated cloth, respectively. For the other surfaces, this value was 9.8 minutes on average. Marble, granite, thick polyvinyl-coated cloth, double-faced rugous polyurethane, and silicone-coated cloth were not different (p < 0.05) in their ability to adhere cells (CFU/cm²) after 2 and 10 hours. The surfaces that had higher percentage of similarity in the adhesion level and higher log CFU/cm² of adhered cells were double-faced rugous polyurethane, silicone-coated cloth, and granite. The surfaces showed very different microtopography characteristics when viewed using scanning electron microscopy. This experiment showed the importance of using appropriate materials for food contact during processing, which will affect the cleaning and sanitation procedures.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License