Immunobiosensor - An alternative to enzyme immunoassay screening for residues of two sulfonamides in pigs

Steven R H Crooks*, G. Andrew Baxter, Mary C. O'Connor, Christopher T. Elliot

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)


A rapid immunoassay using an optical biosensor (BIAcore) for determining the presence of sulfamethazine (SMT) residues in pig bile was developed. The assay was used in a routine screening laboratory alongside a previously described biosensor method fur sulfadiazine (SDZ). Sulfonamide bile concentrations, determined by enzyme immunoassay (EIA), have already been shown suitable for use in predicting the extent of sulfonamide accumulation in kidney. The ability of immunobiosensor based bile screening to predict violative tissue residues (greater than the maximum residue limit; MRL) was compared with results achieved using two conventional EIAs for two of these drug residues (SMT and SDZ). Analysis of 2081 samples for both sulphonamide residues, over an 8 month period, showed the false positive prediction rate of biosensor analysis to be 0.14% and 0.34% for SMT and SDZ, respectively, compared with false positive rates of 1.54% and 1.44% by EIA. Biosensor analysis showed no false negative predictions for either SMT or SDZ while EIA showed a false negative prediction rate of 0.14% for SMT and 0.24% for SDZ. The present study has clearly demonstrated that immunobiosensor assays can be developed for veterinary drug residue screening programmes. These methods have the potential for generating faster and more reliable results than conventional immunoassay methods.

Original languageEnglish
Pages (from-to)2755-2757
Number of pages3
Issue number12
Publication statusPublished - 01 Dec 1998
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry


Dive into the research topics of 'Immunobiosensor - An alternative to enzyme immunoassay screening for residues of two sulfonamides in pigs'. Together they form a unique fingerprint.

Cite this