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. 2020 Dec 18;11:614424. doi: 10.3389/fmicb.2020.614424

FIGURE 4.

FIGURE 4

Effect of tetracycline concentrations on the model predicted abundances of total bacteria and five tetracycline resistance genes [tet(A), tet(B), tet(M), tet(Q), and tet(W) during mesophilic anaerobic digestion of cattle and swine manure, and poultry litter. tet(G) and tet(O) were not shown since they were not significantly associated with the concentration of tetracyclines. Predicted values for the tet genes was obtained after linear regression using tetracycline concentrations as a continuous variable.