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Danofloxacin (DAF), a third-generation fluroquinolone (FQ), is widely used as a broad-spectrum antibacterial drug to prevent diseases in livestock and poultry. In this study, a highly specific and sensitive monoclonal antibody (mAb) against DAF was prepared. Also, the mAb was used for the indirect competitive enzyme-linked immunosorbent assay (icELISA) and immunochromatographic strip for the detection of DAF residues in meat. The IC 50 of the icELISA based on this mAb was 1.39 ng/mL, and the limit of detection was 0.2 ng/mL. According to the cross-reactivity (CR) experiment, the ELISA that we developed was highly specific and had low CR with other FQ analogues. Moreover, the cut-off of the immunochromatographic strip developed for detecting DAF in meat was 5 ng/mL. Overall, the developed ELISA and immunochromatographic strip based on the prepared mAb were proved reliable for the rapid detection of DAF in meat and can be considered as effective screening methods for food safety and quality management.

Preparation of an Antidanofloxacin Monoclonal Antibody and Development of Immunoassays for Detecting Danofloxacin in Meat