Salivary Immunology — NDEB AFK MCQ
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Correct answer: E — IgA
Secretory IgA (sIgA) is the predominant immunoglobulin in saliva and other mucosal secretions. It provides a first line of immune defence by preventing microbial adhesion to oral mucosal surfaces. IgG predominates in serum and gingival crevicular fluid. IgE mediates type I hypersensitivity reactions.
Reference: Nanci – Ten Cate's Oral Histology, 9th ed., 2017