Fig. 3. Relative abundance and diversity of bacteria phylum (A) and bacteria genus (B) in different sampling sites.

The x-coordinate is the sample name, and the y-coordinate is the relative abundance of the species annotated. The classification level was not annotated were grouped at unclassified and with an abundance of less than 20% in a sample were group at others. C1, pre-sterilized cow’s teats; C2, post-sterilized cow’s teats; E, milking cluster; M1, milk in storage tank; M2, transport vehicle; E2, storage equipment; F, cow dung samples; W, drinking water.