MDW as a Novel Diagnostic Biomarker in LONS Among Preterm Neonates

Inclusion Criteria:The study will include: 1. Preterm neonates with gestational age \<37 weeks. 2. Neonates aged \>72 hours of life at the time of enrollment. 3. Neonates with clinical suspicion of late-onset neonatal sepsis, defined by the presence of one or more of the following: * Temperature instability (core temperature \>38°C or \<36°C) * Respiratory distress or new-onset apnea * Feeding intolerance or poor feeding * Lethargy or irritability * Bradycardia or tachycardia * Hypotension * Unexplained clinical deterioration Exclusion Criteria: * Neonates with any of the following will be excluded from the study: 1. Early onset neonatal sepsis. 2. Major congenital anomalies 3. Chromosomal abnormalities 4. Metabolic disorders 5. Severe perinatal asphyxia 6. Neonates with surgical conditions