In particular, work on mice suggests obesity is associated with having a high proportion of bacteria called Firmicutes, whereas the lean favour another group, the Bacteroidetes.

• 尤其是，用老鼠做的实验表明，肥胖和一种叫硬壁菌门的细菌的高比例存在有关。反之，那些窈窕的老鼠肠道内拟杆菌的比例更高。