The National Institute of Mental Health (NIMH) has launched a study to see whether Streptococcus bacteria, which cause strep throat, may also be responsible for obsessive-compulsive disorder (OCD) in children.

While many tend to assume that there is no control over symptoms such as OCD, it’s important to realize that lifestyle can override genetic predispositions and may be part of the underlying cause of the chemical imbalance or dysfunction giving rise to many symptoms.

We have two brains: one inside our skull and one in our gut. Both are created from identical tissue and are connected via the vagus nerve. The gut actually produces more of the neurotransmitter serotonin—thought to play an important role in OCD—than the brain does, so maintaining healthy gut flora may have tremendous benefit for one’s psychological health.

Source: March 28, 2012 issue of New Scientist
For more info: Bacteria Could Be Significant Cause of OCD