The aim was to develop a highly sensitive indirect competitive enzyme-linked immunosorbent assay (ic-ELISA) method for detecting florfenicol (FF) in chicken meat and eggs. The concentrations of the coated antigen and monoclonal antibodies of FF and the reaction conditions were optimised. The performance of the established method was thoroughly evaluated. The results indicated that the detection limit (LOD) was 0.011 μg kg−1 with an IC50 of 0.224 μg kg−1 and a detection range of 0.011–4.538 μg kg−1. The coefficient of variation between and within batches was less than 10%. The spiked recoveries of chicken meat samples ranged from 90.10 to 95.55%, while the spiked recoveries of egg samples ranged from 91.28 to 97.56%. In conclusion, the developed ic-ELISA method is highly sensitive and suitable for monitoring and detecting trace FF residues in chicken meat samples.
An, L., Wang, Y., Pan, Y., Tao, Y., Chen, D., Liu, Z., and Yuan, Z. (2016). Development and validation of a sensitive indirect competitive enzyme-linked immunosorbent assay for the screening of florfenicol and thiamphenicol in edible animal tissue and feed. Food Analytical Methods, 9(9): 2434–2443, https://doi.org/10.1007/s12161-016-0436-3.
Ge, M., Luo, W., Jiang, D., Li, R., Zhao, W., Chen, G., Yang, X., and Yu, X. (2012). Development and application of a double-antigen sandwich enzyme-linked immunosorbent assay for detection of antibodies to porcine circovirus 2. Clinical and Vaccine Immunology, 19(9): 1480–1486, https://doi.org/10.1128/CVI.00234-12.
General Administration of Quality Supervision, Standardization Administration of China (SAC). (2008). Determination of multi-residues of chloramphenicols in animal-original foods. GB/T 22338-2008.
Guo, L., Song, S., Liu, L., Peng, J., Kuang, H., and Xu, C. (2015). Comparison of an immunochromatographic strip with ELISA for simultaneous detection of thiamphenicol, florfenicol and chloramphenicol in food samples. Biomedical Chromatography, 29(9): 1432–1439, https://doi.org/10.1002/bmc.3442.
Guo, X., Chen, H., Tong, Y., Wu, X., Tang, C., Qin, X., and Mo, J. (2024). A review on the antibiotic florfenicol: occurrence, environmental fate, effects, and health risks. Environmental Research, 244: 117934, https://doi.org/10.1016/j.envres.2023.117934.
Guo, Y., Hong, L., Gao, P., Liu, S., Zhu, Y., Xie, X., and Xie, K. (2024). Development of a QuEChERS-HPLC-FLD procedure for the simultaneous detection of residues of florfenicol, its metabolite florfenicol amine, and three fluoroquinolones in eggs. Molecules, 29(1): 252, https://doi.org/10.3390/molecules29010252.
Hu, X., Yao, J., Wang, F., Yin, M., Sun, Y., Hu, M., and Zhang, G. (2017). Eu3+‐labeled IgG‐based time‐resolved fluoroimmunoassay for highly sensitive detection of aflatoxin B1 in feed. Journal of the Science of Food and Agriculture, 98(2): 674–680, https://doi.org/10.1002/jsfa.8514.
Kohl, T.O. and Ascoli, C.A. (2017). Indirect competitive enzyme-linked immunosorbent assay (ELISA). Cold Spring Harbor Protocols, 2017(7): pdb.prot093757, https://doi.org/10.1101/pdb.prot093757.
Lei, X., Xu, L., Song, S., Liu, L., and Kuang, H. (2018). Development of an ultrasensitive ic-ELISA and immunochromatographic strip assay for the simultaneous detection of florfenicol and thiamphenicol in eggs. Food and Agricultural Immunology, 29(1): 254–266, https://doi.org/10.1080/09540105.2017.1371114.
Li, R., Lin, Z.-J., Yang, J.-Y., Xu, Z.-L., Wang, H., Lei, H.-T., and Shen, Y.-D. (2018). An indirect competitive enzyme-linked immunosorbent assay for simultaneous determination of florfenicol and thiamphenicol in animal meat and urine. Chinese Journal of Analytical Chemistry, 46(8): 1321–1328, https://doi.org/10.1016/S1872-2040(18)61104–1.
Luo, P.J., Jiang, W.X., Chen, X., Shen, J.Z., and Wu, Y.N. (2011). Technical note: development of an enzyme-linked immunosorbent assay for the determination of florfenicol and thiamphenicol in swine feed. Journal of Animal Science, 89(11): 3612–3616, https://doi.org/10.2527/jas.2010-3403.
Ma, Z., Gao, X., Yang, X., Lin, L., Wei, X., Wang, S., and Dai, J. (2022). Low-dose florfenicol and copper combined exposure during early life induced health risks by affecting gut microbiota and metabolome in SD rats. Ecotoxicology and Environmental Safety, 245: 114120, https://doi.org/10.1016/j.ecoenv.2022.114120.
Samdal, I.A., Løvberg, K.E., Kristoffersen, A.B., Briggs, L.R., Kilcoyne, J., Forsyth, C.J., and Miles, C.O. (2019). A practical ELISA for azaspiracids in shellfish via development of a new plate-coating antigen. Journal of Agricultural and Food Chemistry, 67(8): 2369–2376, https://doi.org/10.1021/acs.jafc.8b05652.
Tao, X., Yu, X., Zhang, D., Shi, W., Jiang, H., Wang, X., and Shen, J. (2014). Development of a rapid chemiluminescent ci-ELISA for simultaneous determination of florfenicol and its metabolite florfenicol amine in animal meat products. Journal of the Science of Food and Agriculture, 94(2): 301–307, https://doi.org/10.1002/jsfa.6258.
Wang, W., Zhang, Y., and Yang, H. (2022). Development of a nucleocapsid protein-based blocking ELISA for the detection of porcine deltacoronavirus antibodies. Viruses, 14(8): 1815, https://doi.org/10.3390/v14081815.
Yang, X., Wang, Y., Song, C., Hu, X., Wang, F., and Zeng, X. (2020). Hapten synthesis and the development of an ultrasensitive indirect competitive ELISA for the determination of diethylstilbestrol in food samples. Scientific Reports, 10(1): 3270, https://doi.org/10.1038/s41598-020-59112-1.
Yin, M., Hu, X., Sun, Y., Xing, Y., Chai, S., Xing, G., and Zhang, G. (2020). The broad-spectrum and ultra-sensitive detection of zeranol and its analogues by an enzyme-linked immunosorbent assay in cattle origin samples. Royal Society of Chemistry Advances, 10(35): 20809–20816, https://doi.org/10.1039/d0ra02936j.