Normal flora is bacteria and yeast normally found on the skin and in every body orifice (or opening, such as the mouth, ears, rectum, vagina). A newborn carries the flora of his/her mother but soon develops his/her own flora. Flora is present on our bodies until we die. We can disrupt the balance of normal flora, such as when women douche too frequently, and thus the microorganisms begin to multiply and become pathogens.
Today
Yes, usual flora, normal flora, and typical flora are all normal results.
there ara no microbial normal flora in the csf
You said that in your answer too. As the flora is normal, there is no harm
Normal flora cannot cause a "disease". But if normal flora is disrupted it can become a pathogen and then cause infection. Some diseases, like diabetes, can disrupt normal flora and cause infection, especially yeast infections on the skin or in the vagina of women.
normal flora
Normal microbiota
In general, your "normal" skin flora protect you from "rogue" flora which might do you harm.
how does residental normal flora protect the body against pathogens
yes
Yes, normal microbial flora can become virulent or pathogenic if the conditions are right. On outside of body normal flora is harmless, if it was to be ingested it would take the opportunity to do as much damage as possible.
Flora exists in various parts of the human body, in both men and women. Vaginal flora, or microbiome, in normal levels has no disadvantage. It helps the vagina stay "normal", clean and healthy.
Human (normal) gut flora are bacterium largely beneficial to our health and nutrition. These flora are regarded to produce Vitamins B & K. Normal flora also play an important role from birth in the human immune system.