Fig. 13

Variability of reduction (%) of the relative abundance of antibiotic resistance genes (ARG) and mobile genetic elements (MGE) after anaerobic digestion (n is the number of studies; *significant effect with p < 0.05). Considering the organic waste origin, “effluent” corresponds to livestock effluents, divided in sub-categories regarding the type of animal. Positive % means a reduction while negative % means an increase