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    Título
    Preliminary assessment of VIS-NIR-SWIR spectroscopy with a portable instrument for the detection of Staphylococcus aureus biofilms on surfaces
    Autor
    Fernández, Lucía
    Allende-Prieto, Cristina
    Peón, Juanjo
    Recondo, Carmen
    Rodríguez-Gonzálvez, Pablo
    Gutíerrez, Diana
    Martínez, Beatriz
    García, Pilar
    Rodríguez, Ana
    Facultad/Centro
    Escuela Superior y Tecnica de Ingenieros de Minas
    Área de conocimiento
    Ingeniería Cartografica, Geodesica y Fotogrametria
    Título de la revista
    Journal of Food Protection
    Número de la revista
    8
    Editor
    International Association for Food Protection
    Fecha
    2019-08-01
    ISSN
    0362-028X
    Descripción física
    6 p.
    Abstract
    Bacterial biofilms constitute a major source of sanitary problems and economic losses in the food industry. Indeed, biofilm removal may require intense mechanical cleaning procedures or very high concentrations of disinfectants or both, which can be damaging to the environment and human health. This study assessed the efficacy of a technique based on spectroscopy in the visible, near-infrared, and short-wavelength infrared range for the quick detection of biofilms formed on polystyrene by the pathogenic bacterium Staphylococcus aureus. To do that, biofilms corresponding to three S. aureus strains, which differed in biofilm-forming ability and composition of the extracellular matrix, were allowed to develop for 5 or 24 h, representing an active formation stage and mature biofilms, respectively. Spectral analysis of the samples, corresponding to three biological replicates of each condition, was then performed by using a portable device. The results of these experiments showed that partial least squares discriminant analysis of the spectral profile could discriminate between surfaces containing attached bacterial biomass and non-inoculated ones. In this model, the two first principal components accounted for 39 and 19% of the variance and the estimated error rate stabilized after four components. Cross-validation accuracy of this assessment was 100%. This work lays the foundation for subsequent development of a spectroscopy-based protocol that allows biofilm detection on food industrial surfaces
    Materia
    Ingenierías
    Palabras clave
    Biofilms
    Spectroscopy
    Detection
    Food industry
    Idioma
    eng
    Tipo documental
    info:eu-repo/semantics/article
    Peer review
    SI
    URI
    http://hdl.handle.net/10612/12354
    DOI
    https://doi.org/10.4315/0362-028X.JFP-18-567
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