Ophthalmology General 1185b0be An organism not invading intact cornea- A Gonococci B C. diphtheriae C Meningococci D Pseudomonas High-Yield Explanation Following three pathogens can invade the intact corneal epithelium and produce ulceration: Neisseria gonorrhoea, corynebacterium diphtheriae and Neisseria meningitidis.