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Acquired IgA deficiency

M Gleeson1, R L Clancy, A W Cripps

  • 1Hunter Immunology Unit, Royal Newcastle Hospital, NSW, Australia.

Pediatric Allergy and Immunology : Official Publication of the European Society of Pediatric Allergy and Immunology
|August 1, 1994
PubMed
Summary
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This study tracked a child

Area of Science:

  • Immunology
  • Mucosal Immunity

Background:

  • Investigating the development of the mucosal immune system in children.
  • Salivary immunoglobulin A (IgA) plays a crucial role in mucosal defense.

Observation:

  • A child exhibited normal salivary immunoglobulin patterns until age 3 years 6 months.
  • Two respiratory infections preceded the onset of IgA deficiency.

Findings:

  • Selective IgA deficiency was acquired, not congenital, in this subject.
  • Persistent IgA deficiency was confirmed by age 11.
  • A family history of autoimmune disease suggests a genetic predisposition.

Implications:

  • Respiratory infections may trigger acquired IgA deficiency in genetically susceptible individuals.
  • Understanding immune dysregulation is key to identifying risks for acquired immunodeficiencies.