DGGE of PCR products of V6-V8 regions in 16S rDNA of bacteria from feces samples of piglets in the Control, BVAI or BVAII
treatments. Symbol: Control (No.1-4), piglets on control diet with antibiotic; BVAI (No.5-8) or BVAII (No.9-12), piglets on diets
containing 0.4% BV and 0.25% acidifier I or II, respectively.