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    Attachment of different Salmonella serovars to materials commonly used in a poultry processing plant

    Access Status
    Fulltext not available
    Authors
    Chia, T.
    Goulter, R.
    McMeekin, T.
    Dykes, Gary
    Fegan, N.
    Date
    2009
    Type
    Journal Article
    
    Metadata
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    Citation
    Chia, T. and Goulter, R. and McMeekin, T. and Dykes, G. and Fegan, N. 2009. Attachment of different Salmonella serovars to materials commonly used in a poultry processing plant. Food Microbiology. 26 (8): pp. 853-859.
    Source Title
    Food Microbiology
    DOI
    10.1016/j.fm.2009.05.012
    ISSN
    0740-0020
    School
    School of Public Health
    URI
    http://hdl.handle.net/20.500.11937/29483
    Collection
    • Curtin Research Publications
    Abstract

    Salmonella can adhere to poultry and food contact surfaces and persist to cause diseases. Adhesion of Salmonella Sofia (n = 14), S. Typhimurium (n = 6), S. Infantis (n = 3) and S. Virchow (n = 2) to Teflon®, stainless steel, glass, rubber and polyurethane were assayed using epifluorescence microscopy. Surface free energies of bacteria and materials were calculated using contact angle values and interfacial free energy between isolates and materials determined. Surface roughness of the materials was analysed using atomic force microscopy. S. Sofia isolates adhered in higher numbers (P < 0.05) to all materials compared to other serovars. The mean number of cells of S. Sofia isolates attaching to Teflon® were significantly higher (P < 0.05) compared to all materials except stainless steel (P > 0.05). Mean roughness values ranged from 82.26 nm (Teflon®) to 1.34 nm (glass). Correlations between the apolar component of the surface free energy of materials (?SLW) and bacterial adhesion (R2 = 0.80), and between ?SLW and the surface roughness of the materials (R2 = 0.71) were found. Materials more positive in interfacial free energies had the highest number of adhering bacteria. Generalised surface property measurements were found to be useful in characterising Salmonella attachment but the degree of variability in results suggests that other factors, such as flagella or membrane proteins, could also contribute. Crown Copyright © 2009.

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