Figure 1From: Reductions in intestinal Clostridiales precede the development of nosocomial Clostridium difficile infectionDiversity of the intestinal microbiota across Clostridium difficile infection (CDI) cases and control subjects. The 16S rRNA gene sequences were clustered into operational taxonomic units (OTUs) defined by ≥97% nucleotide sequence identity. Case patients (n = 25) are colored in red and control patients (n = 25) are colored in blue. Patients with the lowest degree of intestinal biodiversity (n = 6; all of these patients are cases) are shown with open circles. Results are presented for both V1-V3 and V3-V5 sequence sets. Horizontal lines represent the median and interquartile range. P values were determined by Mann–Whitney U-test.Back to article page