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 Bacilli, Gram Negative Bacilli), Subject name: Microbiology
CSF Chloride is decreased in 
Select and explain. 
A. Chronic alcoholism, B. General Paralysis of insane, C. Pyogenic meningitis, D. Tubercular meningitis
D: Tubercular meningitis
Answer: D: Tubercular meningitis 
Explanation: CSF from tuberculous meningitis often develops a spider web clot on standing Other CSF findings are increased lymphocytes, decreased chloride. The use of PCR and DNA probes may help detect the bacilli speedily and more often.