With regard to NGAL in CSF, levels were significantly higher in patients with bacterial meningitis compared to those with viral meningitis (11,029 ± 12,231.18 vs. 8224 ± 13,492.39 pg/mL, p < 0.05), although the differences of NGAL levels in the patients’ blood were not statistically significant. Here, LCN2 is linked to bacterial meningitis.