Abstract
Immunogenic properties of bovine serum albumin (BSA) conjugates of various beta-lactam antibiotics (ABs) and cross-reactivity of the produced antibodies were investigated in guinea pigs. Each AB-BSA conjugate was immunized with complete Freund's adjuvant. Following the second injection, AB-specific antibodies were detected with high titers. Produced antibodies showed concentration-dependent inhibition by the corresponding AB. Cross-reactivity between the produced antibodies and ABs was evaluated with two methods, i.e. by testing for reactivity with the various AB-ovalbumin conjugates, and by assaying for inhibition of enzyme-linked immunosorbent assay (ELISA) by the various ABs. The latter method could detect minor cross-reactions more sensitively than the former one. The results suggested that similarity of the acyl side chain of a cephalosporin nucleus or a penicillin nucleus contributes to immunological cross-reactivity.
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