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Development of a Bead-Based Multiplex Assay for the Simultaneous Quantification of Three Staphylococcal Enterotoxins in Food by Flow Cytometry

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Abstract

Food-borne diseases are widespread; one of the reasons is contamination with staphylococcal pathogens that can produce enterotoxins of the protein, causing numerous diseases in humans. The long-term stability of the toxins requires that the methods for foodstuff quality control be refined to prevent contamination with staphylococcal enterotoxins. We developed a bead-based multiplex assay for the simultaneous detection of three staphylococcal enterotoxins (staphylococcal enterotoxin A (SEA), staphylococcal enterotoxin B (SEB), staphylococcal enterotoxin H (SEH)) by flow cytometry. For detection, we used functional beads coupled with monoclonal capture antibodies, biotinylated monoclonal detection antibodies, and streptavidin conjugated to phycoerythrin. The linear ranges of detection of SEA, SEB, and SEH were 0.02–20 ng/mL, 0.2–30 ng/mL, and 0.2–20 ng/mL, respectively. Each toxin was specifically detected without cross-reactions. An efficient use of the developed method for the analysis of foodstuffs was reported.

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Funding

This study was supported by a state contract No АААА-А19-119050790041-1, project theme 0101-2019-0038.

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The authors whose names appear on the submission have contributed sufficiently to the scientific work and therefore share collective responsibility and accountability for the results.

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Correspondence to Irina Shulcheva.

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Conflict of Interest

Anna Shepelyakovskaya declares that she has no conflict of interest. Natalia Rudenko declares that she has no conflict of interest. Anna Karatovskaya declares that she has no conflict of interest. Margarita Shchannikova declares that she has no conflict of interest. Irina Shulcheva declares that she has no conflict of interest. Ksenia Fursova declares that she has no conflict of interest. Anna Zamyatina declares that she has no conflict of interest. Khanafi Boziev declares that he has no conflict of interest. Vladimir Oleinikov declares that he has no conflict of interest. Fedor Brovko declares that he has no conflict of interest.

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This article does not contain any studies with human participants performed by any of the authors. Informed consent is not applicable.

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Shepelyakovskaya, A., Rudenko, N., Karatovskaya, A. et al. Development of a Bead-Based Multiplex Assay for the Simultaneous Quantification of Three Staphylococcal Enterotoxins in Food by Flow Cytometry. Food Anal. Methods 13, 1202–1210 (2020). https://doi.org/10.1007/s12161-020-01736-0

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  • DOI: https://doi.org/10.1007/s12161-020-01736-0

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