Characterisation of electrochemical immunosensor for detection of viable not-culturable forms of Legionellla pneumophila in water samples - Université Claude Bernard Lyon 1 Accéder directement au contenu
Article Dans Une Revue Chemical Papers Année : 2015

Characterisation of electrochemical immunosensor for detection of viable not-culturable forms of Legionellla pneumophila in water samples

Résumé

Legionella pneumophila may cause a fatal pneumonia in humans known as Legionnaires’ disease (LD). The strategies of L. pneumophila to adapt to and resist stressful environmental conditions include the ability to enter into a VBNC (viable but not culturable) state. The detection of L. pneumophila in environmental samples benefits from the use of standardised methods: for detection and enumeration following membrane filtration (AFNOR T90-431, ISO 11731) and detection and quantification by polymerase chain reaction PCR (AFNOR T90-471, ISO 12869). Culture is hampered by its inability to detect VBNC forms and PCR is unable to discriminate between live and dead bacteria. The present immunosensor was obtained by the immobilisation of a monoclonal anti-L. pneumophila antibody (MAb) on an indium-tin oxide (ITO) electrode by the self-assembled monolayers (SAMs) method using an aminosilane. The immunosensor was characterised by wettability (contact angle measurement), atomic force microscopy (AFM), confocal laser scanning microscopy (CLSM), and electrochemical impedance spectroscopy (EIS). A limit of detection of 10 bacteria per mL was observed on artificial samples.
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Dates et versions

hal-02100314 , version 1 (15-04-2019)

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Dejla Sboui, Mina Souiri, Stephanie Reynaud, Sabine Palle, Manel Ben Ismail, et al.. Characterisation of electrochemical immunosensor for detection of viable not-culturable forms of Legionellla pneumophila in water samples. Chemical Papers, 2015, 69 (11), ⟨10.1515/chempap-2015-0170⟩. ⟨hal-02100314⟩
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