Micro & Immunology · single question
Which immunoglobulin is predominantly found in saliva?
Show answer and explanation
Correct answer: A. IgA (secretory IgA — sIgA)
- A. Correct. Secretory IgA (sIgA) is the predominant immunoglobulin in saliva and other mucosal secretions, providing first-line mucosal immune defense.
- B. IgG is the predominant immunoglobulin in serum/blood, not saliva.
- C. IgM is the first antibody produced in a primary immune response (mainly in blood), not the predominant salivary immunoglobulin.
- D. IgE is associated with allergic reactions and is not the predominant salivary immunoglobulin.
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