Abstract
In this study, we developed an original and rapid anti-idiotypic antibody-based ELISA method, different from the techniques defined in the literature for this purpose so far, to detect immunoglobulin binding proteins (IBP) on the surface of bacteria. The test antibody used in our study to detect IBP is a recombinant human immunoglobulin G1 Kappa molecule, and has been used as a drug, Tocilizumab (Actemra®), in humans for therapeutic purposes. As a result, the test antibody in the supernatant after centrifugation is reduced compared to the initial moment due to antibody binding. Staphylococcus aureus cowan 1 strain used as positive control causes at least a 50% decrease in OD value in this respect. A similar observation at this level indicated that among a total of 189 microorganisms tested, 3 Staphylococcus aureus and 1 MRSA carrying high-affinity IgBP showed greater than 50% inhibition. This level of inhibition was not detected in the remaining microorganisms.
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