[II. Etiological classification of the small bowel diseases (author's transl)].

A new classification of the small bowel diseases is proposed according to - the physiopathology; - the anatomo-pathology; - the etiology. In this second part, the ethiological classification is developed. One may distinguish the post-surgical lesions, congenital defects, the side-effects of drugs and the vascular lesions. Allergy and infection are especially studied. The main problems which may be solved in a next future are: the mechanism of chronic infections, the biochemical pathology and especially the normal and pathological immunology.