Emesis in infants as a consequence of feedings.

Emesis is a common symptom resulting from adverse food reactions in infants. In this article the terms food allergy and food intolerance are defined and differentiated. The immunopathophysiology of food allergies is discussed along with useful diagnostic tests. Adverse reactions to common infant nutrients such as cow's milk and soy milk are described, and therapeutic use of "hypoallergenic" formulas is outlined.