Organism not invading intact cornea -: (A) Gonococci, (B) C. diphtheriae, (C) Meningococci, (D) Pseudomonas
Answer is D. Following three pathogens can invade the intact corneal epithelium and produce ulceration:Neisseria gonorrhoea,corynebacterium diphtheriae and Neisseria meningitidis. Reference:Comprehensive Ophthalmology,AK Khurana,6th edition,pg no.99