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Fig. 6 | Microbiome

Fig. 6

From: The lung tissue microbiota of mild and moderate chronic obstructive pulmonary disease

Fig. 6

Principal coordinate analysis including negative controls does not demonstrate significant contamination of low-biomass lung-source samples. Principal coordinate analysis with Bray-Curtis distance was performed for all samples and negative controls (extraction and sequencing controls). Negative control samples are indicated in brown, while oral samples are in purple, nasal samples are in blue, bronchial samples are in red, and lung tissue samples are in green. Most negative control samples cluster separately from the clinical samples. One negative control sample appears near the high-biomass nasal samples. The low biomass samples (bronchial and lung tissue samples) do not cluster near the negative control samples

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