Figure 2.

Comparative species-centric co-occurrence network analysis of the bacterial isolates from the previous and present PMU ink surveys. (A), a species-centric co-occurrence network (76-PP SCN) of the 76 PMU ink samples (29 samples of the previous survey and 47 samples of the present survey). In the network, color and size of the nodes indicate pathogenicity (red, pathogenic and green, nonpathogenic) and occurrence rate of the bacterial isolates from PMU ink samples, respectively. Thickness of the edges was weighted by co-occurrence rate. (B), Venn diagrams of the two subnetworks, 29-PMU SCN (the previous survey) and 47-PMU SCN (the present survey), at the species (left) and the genus level (right), respectively.