The Alzheimer’s disease and the bloodstream-brain barrier

When the brain of patients with Alzheimer’s disease was analysed, there was an entire list of disease-causing bacteria, viruses and fungi, and while they were not enough to indicate encefalitis or meningitis, the low levels of pathogens will slowly wear down your defences, making your brain to function suboptimally. It was not really like an all-out war, but more like a sabotage. These findings are both surprising and concerning, as previous it was hypothetised that Alzheimer’s disease (AD) is not infectious.