Moreoer, the differences were not due to a bloom of one species in the Firmicutes or a diminution of a single or a few species of Bacteroidetes: irtually all members of each group were altered.

• 而且，这种差异并不是源于厚壁菌门中一种细菌的增加或者拟杆菌门中一种或几种细菌的减少；事实上这两组细菌中的所有菌种的数量都发生了改变。