Evaluation and Management of Fever in Neonates
Definition and Context
- The American Academy of Pediatrics defines fever as a rectal temperature ≥38.0°C (100.4°F) in neonates 1, 2
- Neonates (0-28 days) have a significantly higher risk of severe bacterial infections due to their immature immune system 2
Diagnostic Evaluation
- The American Academy of Pediatrics recommends a complete evaluation, including blood culture, urine analysis by catheterization or suprapubic aspiration, and lumbar puncture, for all febrile neonates 1, 2
- Blood culture is mandatory for all febrile neonates 1
- Urine analysis and culture must be obtained by catheterization (sensitivity 95%, specificity 99%) or suprapubic aspiration, never by bag collection 3
- Lumbar puncture with cerebrospinal fluid analysis is essential for all neonates 0-28 days, as clinical examination cannot reliably exclude meningitis 1, 2
Empiric Antibiotic Therapy
- The American Academy of Pediatrics recommends immediate empiric antibiotic therapy for all febrile neonates 0-28 days after obtaining cultures 1
- For neonates with no identified focus or suspected bacteremia, the recommended regimen is ampicillin IV or IM (150 mg/kg/day divided every 8 hours) plus either ceftazidime IV or IM (150 mg/kg/day divided every 8 hours) or gentamicin IV or IM (4 mg/kg/dose every 24 hours) 1
- For suspected or confirmed bacterial meningitis, the recommended regimen is ampicillin IV (300 mg/kg/day divided every 6 hours) plus ceftazidime IV (150 mg/kg/day divided every 8 hours) 1
Hospitalization Criteria
- Hospitalization is mandatory for all febrile neonates 0-28 days 1, 2
- Signs of severe bacterial infection requiring immediate intervention include toxic appearance, poor perfusion, petechial rash, inconsolability, altered consciousness, abnormal heart rate or blood pressure, respiratory distress, dehydration, refusal to feed, or vomiting 2