16S rRNA gene amplicon sequencing of faeces from weaned pigs supplemented with probiotic

The objective was to evaluate the effect of dietary Bacillus altitudinis spore supplementation during day (D)0-28 post-weaning (pw) and/or D29-56pw compared with antibiotic and zinc oxide (AB+ZnO) supplementation on pig growth and gut microbiota. Eighty piglets were selected at weaning and randomly assigned to one of five dietary treatments: 1) negative control (Con/Con); 2) probiotic spores from D29-56pw (Con/Pro); 3) probiotic spores from D0-28pw (Pro/Con); 4) probiotic spores from D0-56pw (Pro/Pro), 5) piglets fed AB+ZnO from D0-28pw.