abbreviation for enzyme-linked immunosorbent assay which is a type of blood test usually used to measure antibodies.

Accidental passage of a bowel movement. A common disorder in children.

An infectious disease of the colon. Symptoms include bloody, mucus-filled diarrhea; abdominal pain; fever; and loss of fluids from the body.

An ulcer in the lining of the first part of the small intestine, also called the duodenum.

The first part of the small intestine.

An irritation of the first part of the small intestine, also called the duodenum.

A procedure that uses an electrical current passed through an instrument to stop bleeding.

Upper abdominal discomfort, often provoked by eating, that may be accompanied by fullness, bloating, nausea, or other gastrointestinal symptoms. Also called indigestion.

Problems with swallowing food or liquid, usually caused by blockage or injury to the esophagus.

Chemicals in the body fluids that are parts of salts, including sodium, potassium, magnesium, and chloride. For example, sodium and chloride form sodium chloride, a common salt found in sweat. Chloride has important functions in…