Microbes Help Produce Serotonin in Gut. Although serotonin is well known as a brain neurotransmitter, it is estimated that 90 percent of the body's serotonin is made in the digestive tract.In fact, altered levels of this peripheral serotonin have been linked to diseases such as irritable bowel syndrome, cardiovascular disease, and osteoporosis.lthough serotonin is well known as a brain neurotransmitter, it is estimated that 90 percent of the body's serotonin is made in the digestive tract.
The incubation period of the virus (the time between when you contract the infection and when you start to have symptoms) is four to six weeks. The signs and symptoms of mono typically last for one to two months.Symptoms may include: 1  fever.ono is caused by the Epstein-Barr virus. According to the Centers for Disease Control and Prevention (CDC), EBV is a member of the herpesvirus family and is one of the most common viruses to infect humans around the world (CDC).
Infectious mononucleosis, mono, kissing disease, and glandular fever are all terms popularly used for the very common infection caused by the Epstein-Barr virus (EBV). The characteristic symptoms of infection with EBV include fever, fatigue, malaise, and sore throat.The designation  mononucleosis  refers to an increase in a particular type of mononuclear white blood cells (lymphocytes) in the bloodstream relative to the other white blood cells as a result of the EBV infection.he characteristic symptoms of infection with EBV include fever, fatigue, malaise, and sore throat. The designation  mononucleosis  refers to an increase in a particular type of mononuclear white blood cells (lymphocytes) in the bloodstream relative to the other white blood cells as a result of the EBV infection.