title: Competitive enzyme-linked immunosorbent assay for the determination of zinc bacitracin in animal feedingstuffs.
abstract: Traditionally, bioassay has been the chosen technique for the determination of bacitracin compounds in animal feedingstuffs. However, detection and determination of this antibiotic have given problems when it is present at low levels. A competitive enzyme-linked immunosorbent assay (ELISA) by which it is possible to detect both bacitracin and zinc bacitracin at levels as low as 1 mg kg-1 in animal feeds is described. The ELISA technique has been used in this laboratory to monitor samples from a drug stability storage trial for the presence of zinc bacitracin. In addition, individual polypeptide components of zinc bacitracin have been separated by high-performance liquid chromatography. Fractions were collected and tested by the ELISA technique to assess the response between individual components and the primary antibody. The response was compared with known microbiological activity.
authors.affiliation: Laboratory of the Government Chemist, Teddington, Middlesex, UK.
authors.forename: C
authors.initials: C
authors.lastname: Williams
authors.forename: I
authors.initials: I
authors.lastname: Patel
authors.forename: C J
authors.initials: CJ
authors.lastname: Willer
authors.forename: N T
authors.initials: NT
authors.lastname: Crosby
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D001414:Bacitracin / Q000032:analysis* / Q000276:immunology; D002851:Chromatography, High Pressure Liquid; D004797:Enzyme-Linked Immunosorbent Assay
chemical_list: D001414:Bacitracin