This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Ophthalmology
Severe Conjunctivitis caused by: 
Select and explain. 
A. NeisseriA, B. Staphylococcus, C. Streptococcus, D. Haemophilus
A: NeisseriA
Answer: A: NeisseriA 
Explanation: * The most common causes of acute bacterial conjunctivitis are Staphylococcus aureus, Streptococcus pneumoniae, and Haemophilus influenzae. * Hyperacute cases are usually caused by Neisseria gonorrhoeae or N. meningitidis. * Chronic cases of bacterial conjunctivitis are those lasting longer than 3 weeks, and are typically caused by Staphylococcus aureus, Moraxella lacunata, or gram-negative enteric flora. * Neisseria gonorrhoeae causes gonococcal conjunctivitis, which usually results from sexual contact with a person who has a genital infection. * The incidence rates of gonococcal conjunctivitis increase during spring and summer. * This is a potentially devastating ocular infection, because N. gonorrhoeae can cause severe ulcerative keratitis, which may rapidly progress to corneal perforation. REF : AK KHURANA 7TH ED