CRP and infectious disease: In our patient, the clinical features—characterized by the absence of neck rigidity and fever, normal white blood cell (WBC) count, normal C-reactive protein and procalcitonin levels, and clear CSF analysis showing only mildly elevated protein levels (with no decrease in glucose and no WBC)—made an infectious disease etiology unlikely despite S. agalactiae positivity upon molecular testing, indicating an autoimmune process as the most likely cause.