Salivary protein, which prevents transmission of human immunodeficiency virus via saliva, is____________?
Correct answer: C. Salivary leukocyte proteinase inhibitor
- A. Sialoperoxidase
- B. Secretory IgA
- C. Salivary leukocyte proteinase inhibitor
- D. Histidine rich proteins
Explanation
Salivary leukocyte protease inhibitor, or SLPI, is an innate salivary protein that inhibits HIV infection and helps explain the very low efficiency of HIV transmission through saliva. Secretory IgA also contributes to mucosal defence but is not the specific protein asked for.
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