Alterations of Microorganisms in Tongue Coating of Gastric Precancerous Lesion Patients with a Damp Phlegm Pattern

Figure 2

Shannon index curve of each group (E: GPL group, N: healthy control group, C: GPL damp phlegm pattern group, and D: GPL non-damp phlegm pattern group). The abscissa was the number of sequencing strips randomly extracted from samples, and the ordinate was the Shannon index. With the increase of sequencing quantity, more species were found. Until the species were saturated, increasing the number of sampling strips could not find new OTUs (new species). The microbial diversity of tongue coating in the GPL group was significantly higher than that in the healthy control group. There was no significant difference in microbial diversity of tongue coating between the GPL damp phlegm pattern group and GPL nondamp phlegm pattern group.