Analysis of the Crystal Antigens of <i>Bacillus thuringiensis</i> by Gel Diffusion

Abstract

S ummary . The antigenic patterns of the crystal protein inclusions of Bacillus thuringiensis were determined. No specific antigenic patterns associated with previously described subgroups of this species were found. A larger number of categories of crystal antigen than of flagellar antigen or esterase type were found. In some cases isolates indistinguishable in classifications based on flagellar antigens or esterase types could be subdivided by their crystal antigenic pattern. The use of crystal antigens in classification is discussed.