A 3-day-old infant was presented with yellowish discoloration of the body and fever for the last two days. Physical examination: The infant appeared irritable and jaundiced Respiratory rate: 42/min Heart rate: 140/min Temperature: 37.8°C The infant was born to a 21-year-old primigravida by normal delivery. The course of pregnancy was unremarkable.

At birth: Weight: 3155 g Length: 50 cm Cranial circumference: 34 cm APGAR score: 8 at 1 min and 9 at 5 mins after birth Phototherapy was initiated; however, the infant experienced three episodes of seizures with up-rolling of eyes. Laboratory investigation: C-reactive protein - 4.06 mg/dL Total leucocyte count - 15700 cells/mm 3 Serum bilirubin - 15.2 µg/dL Cerebrospinal fluid (CSF) analysis - 300 × 10 6 cells/L (5% lymphocytes and 95% polymorphs) Protein level - 620 mg/L Glucose level - 1.9 mmol/L Growth on blood agar and gram staining…