Development and fast screening of salbutamol residues in swine serum by an enzyme-linked immunosorbent assay in Taiwan.
The analysis of salbutamol in swine serum is the more practical basis for large scale surveillance programs in Taiwan. Objectives of the study were to develop a new assay and to compare with a commercially available kit in field test screens. A simple and reliable enzyme-linked immunosorbent assay (ELISA) to monitor the presence of beta-agonist, salbutamol, in 1,358 field samples of swine serum that were collected from local meat markets was described. The method proved to be suitable and sensitive for the detection of beta-agonist residues caused by growth promoting dosage. The limit of detection of the developed ELISA directly performed on diluted serum was 0.25 ng/mL. The application and the results of two ELISA kits (homemade and commercially available) for the screening of salbutamol were presented. For further confirmation, all samples that showed to be ELISA positive for salbutamol residues were analyzed by GC-MS. Adopting 1 ng/mL salbutamol as a cutoff value, the commercial beta-agonist ELISA had a sensitivity of 89.2% and a specificity of 86.7% versus GC-MS at a cutoff of 1 ng/mL. The homemade salbutamol ELISA had a sensitivity of 81.1% and a specificity of 98.6% and gave a low proportion of false-positive rate results. The reliability of the developed kit in terms of the percentage of false-positive rate results is evaluated. In conclusion, a sensitive, specific salbutamol ELISA has been developed that could serve as a rapid screening assay, and the detection of positive samples at the place of sampling can result in more effective control of the illegal use of beta-agonists.
Lei
Yi-Chih
YC
Taiwan Advance Bio-Pharmaceutical Inc., Taipei, Taiwan.
Tsai
Yi-Fen
YF
Tai
Yung-Te
YT
Lin
Chiu-Yueh
CY
Hsieh
Kuan-Huei
KH
Chang
Tong-Hsuan
TH
Sheu
Shi-Yuan
SY
Kuo
Tzong-Fu
TF
D000318:Adrenergic beta-Agonists / Q000097:blood*; D000420:Albuterol / Q000097:blood*; D000818:Animals; D004797:Enzyme-Linked Immunosorbent Assay; D008401:Gas Chromatography-Mass Spectrometry; D011933:Reagent Kits, Diagnostic; D012680:Sensitivity and Specificity; D013552:Swine / Q000097:blood*; D013624:Taiwan
D000318:Adrenergic beta-Agonists; D011933:Reagent Kits, Diagnostic; D000420:Albuterol