Figure 1From: High throughput DNA sequencing to detect differences in the subgingival plaque microbiome in elderly subjects with and without dementiaAlpha rarefaction plot demonstrating phylotype diversity in subgingival plaque samples. Shown are the numbers of different Operational Taxonomic Units (OTUs) as a function of the numbers of sequences analyzed and generated with QIIME. OTUs that occur less than 150 times/sample are not included. C, cognitively impaired, not dementia; D, dementia; N, normal.Back to article page