Fig.1. Similarity of symptoms induced by the native toxin and by recombinant virus infection to silkworm larvae. The recombinant virus mimics the native toxin by inducing spasmodic contractions, progressive reduction of mobility and, finally, a complete paralysis in a contracted, shortened body shape (A,C); (A) paralyzed larva 5h after injection of 3µg100mg^-1bodymass of AaIT; (B) larva injected with 5µl of distilled water as a control; (C) paralyzed larva 50h.p.i. with 10⁵p.f.u. of the recombinant baculovirus, BmAaIT; (D) larva 50h.p.i. with 10⁵p.f.u. of the wild-type BmM14 baculovirus. Scale bar, 1cm.