Fig. 3From: Evaluation of respiratory samples in etiology diagnosis and microbiome characterization by metagenomic sequencingRespiratory microbiome revealed by mNGS in four types of specimens (n = 1261). a Alpha diversity of the microbes. b Beta diversity based PCoA plot using the Bray–Curtis distance metrics of bacteria. c Heatmap of the bacteria abundance and LEfSe analysis to rank the discriminating specimen-specific species (LDA score > 3, P < 0.05)Back to article page