Target IVS Source of fecal DNA Number of valid reads Number of IVS-BacBC reads Number of Bacteroides_1 reads Bacteroides_1 Beef cattle 620,942 2, 608 618, 334   Pig 663,883 0 663, 883

Table 4: Distributions of IVS Bacteroides_1 and IVS-BacBC determined by the NGS.