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4. Detection of toxins involved in foodborne diseases caused by Gram‐positive bacteria

Author

Rajkovic, Andreja, primary, Jovanovic, Jelena, additional, Monteiro, Silvia, additional, Decleer, Marlies, additional, Andjelkovic, Mirjana, additional, Foubert, Astrid, additional, Beloglazova, Natalia, additional, Tsilla, Varvara, additional, Sas, Benedikt, additional, Madder, Annemieke, additional, De Saeger, Sarah, additional, and Uyttendaele, Mieke, additional

Published
2020
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8. Development of a Rainbow Lateral Flow Immunoassay for the Simultaneous Detection of Four Mycotoxins

Author

Foubert, Astrid, Beloglazova, Natalia V., Gordienko, Anna, Tessier, Mickael D., Drijvers, Emile, Hens, Zeger, and De Saeger, Sarah

Abstract

A multiplex lateral flow immunoassay (LFIA) for the determination of the mycotoxins deoxynivalenol, zearalenone, and T2/HT2-toxin in barley was developed with luminescent quantum dots (QDs) as label. The synthesized QDs were hydrophilized by two strategies, that is, coating with an amphiphilic polymer or silica. The water-soluble QDs were compared with regard to their bioconjugation with monoclonal antibody (mAb) and were tested on a LFIA. Silica-coated QDs that contained epoxy groups were most promising. Therefore, green, orange, and red epoxy-functionalized silica-coated QDs were conjugated with anti-ZEN, anti-DON, and anti-T2 mAb, respectively. The LFIA was developed in accordance with the European Commission legal limits with cutoff limits of 1000, 80, and 80 μg/kg for deoxynivalenol, zearalenone, and T2/HT2-toxin, respectively. The LFIA gave a fast result (15 min) with a low false-negative rate (<5%), and the results were easy to interpret without any sophisticated equipment.

Published
2024
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