When CSF-MPO is ≥ 16.57ng/mL, there is an 83% probability of having a poor prognosis of bacterial meningitis, as well as when CSF-IL-1β, CSF-IL-6, CSF-IL-8, CSF-IL-18, and CSF-TNF-α levels are at 3.83pg/mL, 123.92pg/mL, 4230.62pg/mL, 35.55pg/mL, and 35.19pg/mL respectively, there is an 83% probability of having a poor prognosis of bacterial meningitis(Fig. 3). Here, IL18 is linked to bacterial meningitis.