We find that the tested faecal outputs are unchanged in all these conditions, suggesting that the impact of the bacterial environment on the intestinal features highlighted by faecal deposit analysis is minimal.
Several hypothesized mechanisms underlie the relationship between smoking and oral health, including impairment of the immune system, alteration of the bacterial environment, increase of endodontic diseases, and decrease of salivary function (34).
This complex phenomenon has many contributing factors: insolubility of the product at the concentrations being produced, inability to fold correctly in the bacterial environment, or lack of appropriate bacterial chaperone proteins [4], [5].
The outcome of the competition between symbiotic nematodes in favour of S. carpocapsae is quite understandable since this competition occurred in a bacterial environment constituted exclusively of X. nematophila.
Knowledge of our human bacterial environment is contributing to an understanding of a variety of disorders including obesity and metabolic syndrome, cardiovascular disease, immunity, and neuronal development and behavior.
In this study, we show how gross changes in the bacterial environment, such as the onset of infection, can profoundly perturb the sociomicrobiological structure of the bacterial population, driving a minor subpopulation with a mutant hypervirulent phenotype to thrive, prevail, and cause severe disease.
This large number reflects a high degree of adaptability and the presence of mechanisms and structures involved in the exploration of the bacterial environment and adaptive colonisation.
Interestingly, bacteria have been exposed to AMPs for millions of years, and despite the continual presence of AMPs in bacterial environment, widespread resistance has not been reported.
Complex bacterial environments can be composed indeed of several underrepresented species, difficult to isolate.
It is therefore important to characterize the frequency of resistance within natural bacterial environments.
