RT Book, Section A1 Garcia-Lloret, Maria A2 Rudolph, Colin D. A2 Rudolph, Abraham M. A2 Lister, George E. A2 First, Lewis R. A2 Gershon, Anne A. SR Print(0) ID 7018540 T1 Chapter 191. Clinical Aspects of Allergic Diseases T2 Rudolph's Pediatrics, 22e YR 2011 FD 2011 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-149723-7 LK accesspediatrics.mhmedical.com/content.aspx?aid=7018540 RD 2024/04/25 AB Allergic rhinoconjunctivitis, asthma, and food allergy are some of the prototypical allergic diseases. While allergies may develop at any age, allergic sensitization (ie, development of IgE responses) occurs predominantly early in life. Food-specific IgE antibodies may appear in the very young to herald an early presentation of clinical food allergies. Environmental allergen-specific IgE antibodies develop mostly after the age of 2, often leading to allergic rhinitis and or allergic asthma in preschool or school-aged children. Although not all allergic diseases invariably develop in the same patient, in a sizeable number of children the progressive sensitization to multiple antigens will result in sequential and often cumulative manifestations of atopy, a continuum that is known as the allergic march or the allergic marathon. It follows that allergic sensitization in childhood can have long-lasting effects throughout the life of the individual and implies a considerable burden to society as a whole.