This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Gram Positive Cocci, Gram Negative Cocci), Subject name: Microbiology
Waterhouse friederichsen syndrome is caused by 
Select and explain. 
A. Neisseria gonorrheae, B. Neisseria meningitidis, C. Chlamydia trachomatis, D. Lymphogranuloma venerum
B: Neisseria meningitidis
Answer: B: Neisseria meningitidis 
Explanation: Waterhouse friederichsen (WF) syndrome is fulminant meningococcemia characterized by shock, disseminated intravascular coagulation, petechial rash and multisystem failure due to the lipo-oligosaccharide mediated damage of the vascular endothelium. it is caused by N.meningitidis