Activity of disinfectants against foodborne pathogens in suspension and adhered to stainless steel surfaces

• Author(s): Tomazella, Tatiane Karen Cabeça [UNESP] ; Pizzolitto, Antonio Carlos [UNESP] ; Pizzolitto, Elisabeth Loshchagin [UNESP]
• Date: 2014
• Persistent ID: http://hdl.handle.net/11449/7936
• Origin: Oasisbr
• Subject(s): biofilm cells; plancktonic cells; disinfectants
• Document Type: Journal article
• Language: English

Description

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The purpose of this study was to investigate and compare the efficacy of various disinfectants on planktonic cells and biofilm cells of Listeria monocytogenes, Staphylococcus aureus and Escherichia coli. Numbers of viable biofilm cells decreased after treatment with all tested disinfectants (iodine, biguanide, quaternary ammonium compounds, peracetic acid and sodium hypochlorite). Sodium hypochlorite was the most effective disinfectant against biofilm cells, while biguanide was the least effective. Scanning electron microscopy observations revealed that cells adhered on stainless steel surface after treatment with the disinfectants. No viable planktonic cells were observed after treatment with the same disinfectants. Based on our findings, we concluded that biofilm cells might be more resistant to disinfectants than plancktonic cells.

Universidade Estadual Paulista Faculdade de Ciências Farmacêuticas

Universidade Estadual Paulista Faculdade de Ciências Farmacêuticas