Figure 2
From: Benchmarking laboratory processes to characterise low-biomass respiratory microbiota

Microbiota composition profiles of 2 oropharynx (S003 and S004) and 2 saliva samples (S001 and S002). Stacked bar charts of the relative abundance of the top 15 OTUs and the residuals are shown. (a) Microbiota profile of OP and saliva samples amplified by 25, 30 or 35 PCR cycles. (b) Microbiota composition of OP and saliva samples with a bacterial load of 16, 125 or 1000 pg.