C. Investigations: The initial diagnosis of Meningitis is based on the CSF analysis. After the Neonatal period, the normal CSF should have <5 cells per cumm. A glucose level >50% of the serum concentration, a protein level <45mg/dl, and a negative gram stain. In pyogenic meningitis the CSF pressure is increased, the cell count is more than 500/cumm, the glucose level is reduced, the proteins elevated and Gram stain is positive. CBC shows polymorpholeuco-cytosis.
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