Phlyctenular keratoconjunctivitis is due to hypersensitivity to which of the following allergens: (A) Pollen, (B) Chemicals, (C) Mycobacterium tuberculosis proteins, (D) Animal fur
Answer is C. Phlyctenular keratoconjunctivitis is due to hypersensitivity to endogenous allergens like Mycobacterium tuberculosis proteins and Staphylococcus proteins.