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When major changes occur in healthy individuals, they often appear due to changes in the relative abundance of taxa rather than the arrival of new lineages [ 9 ]. Short-term effect of antibiotics on human gut microbiota. In turn, we might expect that, among domesticated animals, that similar problems should be most common in those animals that, like us, have very acidic stomachs. Herbivory imposes another, the need to digest plant material refractory to enzymatic digestion cellulose and lignin. A consequence of this procedure is an increase in gastric pH levels that range from 5.

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In vitro fermentation of dietary carbohydrates in African apes and monkeys: preliminary results on digestive and microbial strategy.

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A large body of literature now suggests that a variety of human medical problems relate to the loss of mutualistic gut microbes, whether because those mutualists failed to colonize during hyper-clean C-section births [ 46 ] or were lost through use of antibiotics [ 47 ], or other circumstances. Preliminary observations of the digestive enzyme system of the beaver Castor canadensis. We conducted a systematic review to test the hypothesis that a key role of the vertebrate stomach is to maintain the gut microbial community by filtering out novel microbial taxa before they pass into the intestines.

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