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An improved enzyme-linked immunoassay for the detection and quantification of the entomocidal parasporal crystal proteins of Bacillus thuringiensis subsp. kurstaki and israelensis.

An improved and simplified enzyme-linked immunosorbent assay (ELISA) was developed for the detection and quantification of parasporal crystalline toxins from Bacillus thuringiensis subsp. kurstaki. The improved procedure involved pretreatment of the polystyrene cuvettes with glutaraldehyde before antibody coating. A direct comparison of treated and untreated cuvettes is provided. ELISAs were then used for the analysis of the entomocidal crystalline proteins in commercial and experimental formulations of B. thuringiensis subspp. kurstaki and israelensis.