New research adds to the growing work linking an infection caused by the Toxoplasma gondii parasite to suicide attempts. About 10-20 percent of people in the United States have T. gondii, in their bodies.
Through a combination of genetic and psychological testing, researchers have identified factors that mitigate against PTSD. In combat, soldiers who avoided threats were more likely to develop PTSD as a result of traumatic experiences, the study found.
Researchers suggest serotonin metabolism in the pineal gland could play a role in the underlying cause of depression. The findings were based on biochemical changes which were seen to be in association with improvements in depression.