The group isolated the metagenomes of gut microbiota from 162 individuals. They identified a total of 1,093 antibiotic resistance genes and found that Chinese individuals harbour the highest number and abundance of antibiotic resistance genes, followed by Danish and Spanish individuals. Tetracycline resistance genes were especially abundant.

Yongfei HU et al., Nature Communications 2013 Jul 23;4:2151. doi: 10.1038/ncomms3151