Due to the rapid development of high technology in medicine and the ability to obtain the highest resolution images, which today allow for detailed study of the objects in question, it was found that an unknown site is in the human body selected by bacteria. And there they can form clusters.
These are the human brain! Protection is nature, but recent studies confirm that this is so. There are skeptics, but most scientists do not question this question. The fact is that electronic microscopy is practically not exposed to the brain of the dead, so research on brain tissue samples has not been performed.
The fact is that the gut is an organ that is mostly populated by various bacteria. And some of them, Firmicutes, Proteobacteria and Bacteroidetes, were found in the human brain, and no inflammatory processes were found. Scientists have a question about how they got into the brain? In the event that a bacterium enters the brain, it can cause neurological diseases, including schizophrenia and even Parkinson's disease.
The main question that scientists ask is how the intestinal bacteria affect the brain. Conclusions have not yet been adopted. Perhaps this has happened with the flow of blood through the vessels. But research continues, sooner or later scientists will find the answer to this question.