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Strategy for detecting SEB in buffer and stool using antibody-coated magnetic nanobeads. (A) Steps for processing samples with colloidal immunomagnetic beads (antibody-coated superparamagnetic nanobeads). Anti-SEB antibody-modified nanobeads were mixed with solutions containing the target antigen (SEB) prior to the SPR measurement; (B) SPR detection of staphylococcal enterotoxin B (SEB) in buffer (663 RIU), in stool (365 RIU), and unprocessed (7 RIU). Adapted from [115].
