In Vitamin A deficiency, respiratory tract infection due to:
Vitamin A: - Role 1) Vision 2) Reproduction & growth 3) Maintenance of epithelial cell 4) Stabilization of cellular and intra Cellular membrane 5) Synthesis of glycoprotein 6) Antioxidant 7) Skin & Bone Metabolism
Keratinization of upper epithelial cells
Lack of antibody production
Dysfunction of epithelial layer
Defective chemotaxis
JIPMER 2017