Cause of meningitis	CSF stain findings
Cryptococcus neoformans	India ink stain shows typical encapsulated yeast forms
Haemophilus influenzae	Gram stain reveals gram-negative bacilli
Listeria monocytogenes	Difficult to diagnose; Gram stain may show gram-positive rods and/or coccobacilli
Neisseria meningitidis	Gram stain reveals gram-negative diplococcus
Streptococcus pneumoniae	Gram stain reveals gram-positive cocci inpairs