The species richness (number of DGGE bands) and bacterial community diversity index (Shannon index, H´) in the feces of
piglets in the Control, BVAI and BVAII treatment. Bars are sd. BVAI (No.5-8) or BVAII (No.9-12), piglets on diets containing 0.4% BV
and 0.25% acidifier I or II, respectively. a,bMeans in the bar bearing different superscript are significantly different (P < 0.05).