From 30 to 50% of the population of Earth is infected with the parasite Toxoplasma gondii. This is a fairly common parasite that causes toxoplasmosis. The infection with it also affects animals, especially cats. Man becomes infected, usually by eating undercooked infected meat or during cleaning of animal excrement.
The beginning of toxoplasmosis is manifested by symptoms resembling mild flu, then entering into a chronic, and then in the sleeping phase, occurring usually asymptomatic. However, if your immune system is weakened, the danger of parasite death. Besides the well-known ability of penetration of the parasite into the amniotic area in pregnant women, therefore, they should refrain from contact with Pets.
Scientists have also found that, even in the sleeping phase, the parasite contributes to increasing the risk of mental disorders, including schizophrenia, depression and increased anxiety.
The process is as follows: the parasite gets into the brain and then begins to produce the neurotransmitter GABA (gamma-aminobutyric acid), which, except for other effects, responsible for feelings of fear and anxiety. According to studies on rats, GABA is released by the cells responsible for the immune system, such reaction they have when alien penetration into the body.
Scientists will continue to study the mechanisms of action of parasites to obtain more accurate data about what the impact of experiencing the human nervous system.