BACKGROUND: Clopidol is mainly used for the prevention and treatment of coccidiosis, which poses a serious potential hazard to public health, in veterinary medicine. The aim of this study was to prepare monoclonal antibodies (mAbs) against clopidol (CLOP) and develop an immunoassay for detecting CLOP residues in chicken tissues. After derivation, CLOP hapten was conjugated to carrier proteins to synthesize the artificial antigen, and immunized Balb/C mice were employed to screen mAbs. RESULTS: A sensitive hybridoma named C1G3 was screened out and two indirect competitive enzyme-linked immunosorbent assay (icELISA) standard curves were established. For the traditional two-step assay the linear range was from 0.06 to 98 ng mL(-1), with half-maximal inhibitory concentration (IC50) and limit of detection (LOD) values of 2.76 ng mL(-1) and 0.03 ng mL(-1) respectively, while the rapid one-step icELISA had a working range from 0.08 to 102 ng mL(-1), with IC50 and LOD values of 3.52 ng mL(-1) and 0.03 ng mL(-1) respectively. It was also indicated that a 10-fold dilution in chicken muscles gave an inhibition curve almost the same as that obtained in phosphate-buffered saline. When applied to spiking tests in chicken samples, the correlation coefficient (R-2) between concentrations added and measured was 0.9534. CONCLUSION: The results of this study suggest that the immunoassay described is a promising alternative for screening CLOP residues in biological matrices and is suitable for routine diagnostics. (C) 2014 Society of Chemical Industry
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NW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R ChinaNW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R China
Zhang, Jing
Feng, Gang
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NW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R ChinaNW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R China
Feng, Gang
Luo, Li
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NW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R ChinaNW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R China
Luo, Li
Yu, Xiang Yang
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Jiangsu Acad Agr Sci, Food Safety & Serv Ctr, Nanjing 210014, Peoples R ChinaNW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R China
Yu, Xiang Yang
Ma, Zhi Qing
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NW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R ChinaNW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R China
Ma, Zhi Qing
Feng, Jun Tao
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NW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R ChinaNW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R China
Feng, Jun Tao
Liu, Xian Jin
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Jiangsu Acad Agr Sci, Food Safety & Serv Ctr, Nanjing 210014, Peoples R ChinaNW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R China
Liu, Xian Jin
Zhang, Xing
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NW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R ChinaNW A & F Univ, R&D Ctr Biorat Pesticides, Yangling 712100, Shaanxi, Peoples R China