Regional enteritis: what is it? Enteritis is an inflammatory process of the mucous membrane of the small intestine. It can be caused by infectious and non-infectious causes. The term "regional" refers to the affected area in the small intestine. In this case we are talking about regional enteritis, which is an acute inflammation of the mucous membrane of the jejunum and ileum. This disease is quite common, especially among children aged 2 to 8 years. The causes of the disease can be divided into infectious (for example, viral diarrhea, dysentery, cholera) and non-infectious (enteritis associated with allergic reactions, malabsorption syndrome and others). Infect