The effect of sample storage conditions on the resistome. (A) Box plots displaying total antimicrobial resistance (AMR) abundance in the unspiked samples (P1, P2, S1, and S2) measured in FPKM relative to the total number of bacterial reads. (B) Procrustes rotation comparing the resistome and taxonomic dissimilarities in the four unspiked samples. For the results of the spiked samples, see Fig. S13 in the supplemental material. SS, sum of squares.