Within the vault of thought and dream, A mystery stirs, or so it seems. Though sterile once, as all agreed, A thriving world may yet proceed.
Indeed, the blood-brain barrier stands, A fortress built by nature's hands. Yet through its gates, could life persist, Invisible worlds that coexist?
For instance, in Alzheimer's shroud, Bacteria’s whispers grow quite loud. Moreover, in diseases like MS, Microbial sparks may fuel distress.
Similarly, when meningitis calls, A microbial siege may breach the walls. Yet still, the question lingers on, Are they invaders—or belong?
Meanwhile, the gut sends signals clear, Through vagus nerve, it draws us near. Because of metabolites’ subtle art, They bridge the gap, brain and gut apart.
Next, we turn to science's eye, Microscopes scan earth and sky. Although we see, we question still, Contamination or nature's will?
Thus, the future calls us to explore, The brain microbiome, and much more. Therefore, we seek new paths to tread, Where microbes dance and science is led.
In the end, as knowledge grows, The brain's great secret subtly shows. Between its folds, life may reside, A hidden world, vast and wide.
