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Some Bacillus thuringiensis strains secrete type I β-exotoxin, which is a non-specific insecticidal and thermostable adenine nucleoside oligosaccharide. Toxicity bioassays and HPLC are traditional methods for detecting β-exotoxin. With the aim of establish a first rapid approach for prediction of type I β-exotoxin production, two PCR-based methods were successfully evaluated in B. thuringiensis strains...