You can have both parasites, bacteria and virus in your brain. Many deluted and crazy people out on the streets could have brain infections I believe. To make an example, there are studies that show that borna virus oftentimes plays a major part in bipolar disease, and other germs in other illnesses. If you look at the inner terrain as was discussed in the article from glaxony; that can often reverse an illness in itself, and when you look at some bipolar people who take large amounts of nutrition for the brain, they can get remarkably better (in their own claims). If you believe this theory you need to cleanse and fill up with nutrition. One problem with some germs like parasites is they feed on the nutrition as well so they don´t die and you will still have a health problem.