Bacterial meningitis is an inflammation of the meninges, in particular the arachnoid and the pia mater, associated with the invasion of bacteria into the subarachnoid space.The pathogens take advantage of the specific features of the immune system in the CNS, replicate and induce inflammation. A hallmark of bacterial meningitis is the recruitment of highly activated leukocytes into the CSF.The predominant causative pathogens in adults are Streptococcuspneumoniae, Neisseriameningitidis, and Listeria monocytogenes which are respon...