TY - CHAP M1 - Book, Section TI - Chapter 187. Undue Susceptibility to Infection A1 - Chatila, Talal A. A2 - Rudolph, Colin D. A2 - Rudolph, Abraham M. A2 - Lister, George E. A2 - First, Lewis R. A2 - Gershon, Anne A. PY - 2011 T2 - Rudolph's Pediatrics, 22e AB - Each year, a large number of children are evaluated by their primary care physicians for recurrent infections, an especially common event in early childhood.1 The overwhelming majority of such cases are benign, and an extrinsic cause of recurrent infection is identified. Examples of extrinsic causes include heightened exposure to pathogens in a daycare setting, carriage of a pathogenic organism such as Staphylococcus aureus in the context of recurrent infection with this organism, or recurrent upper respiratory tract infections in the context of parental smoking. However, concern about an intrinsic pathologic underpinning is heightened on the basis of frequency of infections, their severity, and the nature of the offending organism. The coexistence of multisystem disease, autoimmunity, or lymphoreticular malignancy should also prompt evaluation for immunodeficiency. A family history of recurrent infections raises the index of suspicion. SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/04/20 UR - accesspediatrics.mhmedical.com/content.aspx?aid=7018253 ER -