The genetic relationships of Bacillus cereus and of the Bacillus thuringiensis serovars were assessed from measurements of DNA reassociation. A study of 8 to 10 strains each of 13 of the most commonly encountered serovars revealed that the levels of intragroup DNA relatedness for most serovars ranged from 90 to 100%. In contrast, B. thuringiensis serovars canadensis and kenyae consisted of two ...

Bacillus thuringiensis is an important entomopathogenic bacterium belongs to the Bacillus cereus group, which also includes B. anthracis and B. cereus. Several genomes of phages originating from this group had been sequenced, but no genome of Siphoviridae phage from B. thuringiensis has been reported. We recently sequenced and analyzed the genome of a novel phage, BtCS33, from a B. thuringiensi...

The toxicity of purified Bacillus thuringiensis var. israelensis crystals to larvae of Aedes aegypti could be reversed 100-fold by levels of K(2)CO(3) as low as 0.15%.

El objetivo del trabajo fue evaluar Bacillus thuringiensis var. Kurstaki (Bt-K), como alternativa de control biológico polillas papa Phthorimaea operculella y Tecia solanivora, en almacenamiento Cerro Punta, Chiriquí, República Panamá. Para ello, se seleccionaron cinco lotes papa, sometidos a diferentes dosis aplicación producto Dipel 6.4WG (Bt-K). Se empleó un Diseño Bloques Completos al Azar,...