found: Work cat.: Haider, S.T. Host-range specificity of a Bacillus thuringiensis (Bt) toxin as analyzed by protein engineering, 1999:leaf 1 (Bacillus thuringiensis was recognized in 1951 as having insecticidal properties; produces insecticidal proteins) leaf 4 (formulations of Bt have been used successfully for more than two decades as biological insecticides to control agricultural and forestry pests and, more recently, insect vectors of a variety of human and animal diseases) leaf 111 (bacterial insecticides)
