This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Anatomy
Phlyctenular conjunctivitis seen due to 
Select and explain. 
A. Post fungal infection, B. Allergic, C. Post protozoal, D. Post tuberculoid
B: Allergic
Answer: B: Allergic 
Explanation: Phlyctenular conjunctivitis is seen due to Hypersensitivity reaction. Type 4 hypersensitivity reaction Due to endogenous allergens likeStaphylococcus aureus(most common) andMycobacterium tuberculosis Characterized by the following: Phlycten May eventually form ring ulcers Scrofulous ulcer: shallow marginal ulcer due to the breakdown of limbal phlycten Fascicular ulcer has a prominent parallel leash of blood vessels. It heals leaving a band-shaped opacity. Treatment: Topical steroids; atropine if the cornea is involved. Phlyctenular conjunctivitis