Figure 1.

(A) Venn diagram of the antibiotic resistance-gene types shared between the groups and (B) Diversity analysis of the antibiotic resistance-gene types in each group. The following abbreviations were used: CH, pre-school-aged children; SC, school-aged children; HSS, high school students; and AD, adults. The different colors in panel (A) represent the different groups: red, CH group; blue, SC group; green, HSS group; and yellow, AD group; one antibiotic resistance-gene type shared among the CH, SC and AD groups is not presented. The Gini-Simpson index was calculated using GENALEX 6.