Ceftiofur case study.

Shannon (A) and Chao1 (B) α-diversity, and relative abundance of the phyla (C) from faecal samples from cows treated with ceftiofur (n = 3) and respective control cows (n = 3). Principal Component Analysis (D) for the faecal microbiome of treated and control cows at the individual animal level (colours) over the sampling period (shapes). The percentage of variation explained in the Principal Component Analysis is indicated on the axis labels.