Intestinal cow's milk allergy

Cow's milk allergy (CMA) is multifaceted disease representing systemic, skin or gastrointestinal reactions to cow's milk (CM) protein. This article shortly reviews the intestinal form of CMA (ICMA). According us the child is allergic to CM when the immunologic reaction to CM is associated with clinical symptoms. The incidence of CMA is 1.3-1.9% in general, but the ICMA only 0.6 pro mille among the children less than six months of age. The majority of infants shows symptoms within a month of starting CM feeding. The majority of children with CMA have gastrointestinal symptoms. Manx of these infants has additionally dermatological symptoms and some respiratory symptoms. The mode of onset is often acute diarrhoea and vomiting, as in acute gastroenteritis. Laboratory findings indicate iron deficiency anemia in 20-70%. Half to two thirds of infants with chronic diarrhoea have moderate to severe steatorrhoea. The morphologic lesion in the gastrointestinal tract in ICMA is widespread, often being present from stomach to rectum. Jejunal lesion is most severe in the proximal part of the intestine and nowadays most patients have only partial villous atrophy or slight changes of the villi. Both the epithelium and the lamina propria of the jejunum are infiltrated with inflammatory cells. The morphology of the small intestine speaks for a strong immune reaction which leads increased destruction of surface epithelial cells. We recommend elimination of CM proteins to the age of 1.5 to 2 years. Most patients tolerate CM by the age of 2 years without symptoms. Prolonged breast-feeding and avoidance of early contact with CM are important in reducing the severity and frequency of CMA.