NEONATAL NECROTIZING ENTEROCOLITIS, A DISEASE OF THE IMMATURE INTESTINAL MUCOSAL BARRIER

Necrotizing enterocolitis (NEC) is an enigmatic process in that one si ngle etiologic factor has been sought and not found. Epidemiologic stu dies suggest that immaturity of the host plays a very important role. This article reviews the intestinal host defense system and its immatu re nature early in life in animal models and humans and suggests that it is this immaturity, along with other factors, which allows for the proliferation and invasion of antigens and organism, and the subsequen t development of NEC. Data are presented which support the efficacy of pharmacologic maturation of the intestinal barrier with growth factor s, either prenatally or postnatally, to decrease the incidence of NEC or, potentially, to provide a more benign course for the disease.