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

Figure 1

Rarefaction curve of each sample. The abscissa was the number of randomly selected sequencing strips, and the ordinate was the number of OTUs obtained by clustering based on the number of sequencing strips. Each curve represented a sample and was marked with different colors. The figure reflected the rate of emergence of new OTUs (new species) under continuous sampling: within a certain range, with the increase of the sequencing number, when the curve showed a sharp rise, it meant that a large number of species were found in the community. When the curve tended to be flat, it indicated that the species in this environment would not increase significantly with the increase of sequencing quantity.