[A comparison of the antibacterial activity of the parasporal bodies of different bacilli]

Solutions of the parasporal bodies of Bacillus sphaericus, B. laterosporus, and several B. thuringiensis subspecies display antibacterial activity showing the potential of membranotropic action of the body proteins. Comparison of the antibiotic effect of various delta-endotoxins of B. thuringiensis made it possible to identify highly active unique proteins. This approach forms the basis of goal-directed search for organisms sensitive to polypeptides of various bodies. It has already been established that delta-endotoxins of B. thuringiensis ssp. amagiensis cause the death of representatives of the fourth (in addition to the three previously known) order of insects, Isoptera.