Bacillus thuringiensis (Bt) ndi kachilombo ka gram-positive.Ndi anthu osiyanasiyana.Malingana ndi kusiyana kwa antigen yake ya flagella, Bt yokhayokha ikhoza kugawidwa mu 71 serotypes ndi 83 subspecies.Makhalidwe a mitundu yosiyanasiyana amatha kukhala osiyana kwambiri.
Bt imatha kupanga mitundu yambiri yamagulu ophatikizika kapena owonjezera a bioactive, monga mapuloteni, ma nucleosides, amino polyols, ndi zina zambiri. Bt makamaka imakhala ndi mankhwala ophera tizilombo motsutsana ndi lepidoptera, diptera ndi coleoptera, kuphatikiza mitundu yoyipa ya 600 mu arthropods, platyphyla, nematoda ndi protozoa, ndi mitundu ina imakhala ndi zochita zowononga maselo a khansa.Amapanganso zinthu zogwira ntchito zolimbana ndi matenda.Komabe, kuposa theka la mitundu yonse ya Bt, palibe ntchito yomwe yapezeka.
Kuzungulira kwathunthu kwa moyo wa Bacillus thuringiensis kumaphatikizapo kupangika kwa maselo obiriwira ndi spore.Pambuyo activating, kumera ndi kutuluka matalala spore, buku la selo limawonjezeka mofulumira, kupanga maselo vegetative, ndiyeno kufalitsa mu njira ya bayinare magawano.Selo likagawanika komaliza, kupangika kwa sporo kumayambanso mofulumira.