Micro & Immunology · single question
What is the major immunoglobulin found in saliva, and what is its general functional role?
Show answer and explanation
Correct answer: A. Secretory IgA, providing combined antibacterial and antiviral mucosal defense by blocking pathogen adherence and aiding neutralization
Secretory IgA is the predominant immunoglobulin in saliva, produced by local plasma cells and transported across mucosal epithelium with a protective secretory component. It provides first-line mucosal immune defense with both antibacterial activity (blocking bacterial adherence to mucosal surfaces) and antiviral activity (neutralizing viral particles before they can infect host cells).
Practice Micro & Immunology questions Micro & Immunology study notes