A type of blood test usually used to measure antibodies.

One of many kinds of cells that form the epithelium and absorb nutrients.

The inner and outer tissue covering digestive tract organs.

The part of an antigen to which an antibody binds.38

A disease in which the lining of the esophagus becomes infiltrated with a type of white blood cell called an eosinophil.

An irritation of the stomach, small intestine, or large intestine caused by a type of white blood cell called an eosinophil.

A noisy release of gas from the stomach through the mouth. Also called belching or burping.

Swelling or red sores on the lower legs during flare-ups of Crohn

A family of bacteria found in the gastrointestinal tract. Some forms may cause diarrhea.

A test to measure muscle contraction in the esophagus.