"To test whether Gram-positive cell wall components in general were able to trigger the same S. aureus-induced response, we assayed gene induction in animals feeding on non-pathogenic Gram-positive bacterium Bacillus subtilis compared with E. coli-fed controls. Remarkably, of the ten biomarker genes, only
fmo-2, ilys- 3, and Y65B4BR.1 were induced by B. subtilis, albeit at much lower levels than with S. aureus (Figure 6B). The remaining 7 genes either were not induced or were repressed by B. subtilis."