Figure 2
From: Gut microbiota composition is associated with polypharmacy in elderly hospitalized patients

Average gut microbiota biodiversity of hospitalized patients. Average gut microbiota alpha-diversity curve of the 76 stool samples analyzed by 16S rRNA microbial profiling metagenomics techniques. The curve represents the average Chao1 index, corresponding to the number of Operational Taxonomic Units (OTUs), at increasing sequencing depth.