Figure 1.
Average number of major bacterial OTUs (relative abundance of ≥0.5 or ≥1%) identified in Firmicutes, Bacteroidetes, Clostridia, and Prevotella. CTRL, control; ORO, origanum oil; GAO, garlic oil; PEO, peppermint oil; Different letters (a–c) above the bars indicate significant (P ≤ 0.05) differences among the treatments (three replicates per treatment).