Clinical feature	Adults (%)*	Older adults†(%)*
Headache	87 to 92	60 to 77
Neck stiffness	83 to 86	31 to 78
Nausea	74	36
Fever	72 to 77	48 to 84
Positive blood culture	62 to 66	73
Altered mental status	60 to 69	84
Focal neurologic deficit	29 to 33	46
Rash	26	4 to 11
Seizure	5	5
Papilledema	3	4