Febrile Neonate (0–28 Days)
Neonates (0–28 days) with fever are managed as high risk for invasive bacterial infection. Fever is defined as a rectal temperature of ≥38.0°C (≥100.4°F). [1] [2]
Definition and Immediate Risk Stratification
Clinical risk assessment is based on:
- Age (0–28 days). [2]
- Appearance (well-appearing vs ill-appearing). [3]
Any ill appearance is managed as a suspected invasive infection requiring full sepsis evaluation and empiric IV therapy. [2]
Diagnostic Evaluation Algorithm (0–28 Days)
For neonates <28 days with fever, evaluation is recommended to include:
- Full history and physical examination (focus on source and occult infection). [2]
- Complete blood count. [2]
- Blood culture. [2]
- Lumbar puncture. [2]
- Urinalysis and urine culture. [2]
Hospital admission is typically required for the neonate age group due to the high baseline risk for invasive infection. [2]
Empiric Antimicrobial Therapy (0–28 Days)
Empiric IV antibiotics for suspected serious bacterial infection in neonates should be initiated after cultures are obtained. [4] [2]
A commonly recommended empiric regimen for neonatal bacterial sepsis is:
- Ampicillin plus gentamicin for coverage of typical neonatal pathogens. [4] [5]
Empiric therapy is selected by local susceptibility patterns, risk factors, and severity of illness. [4]
Monotherapy vs Combination Therapy
Combination therapy is recommended for empiric treatment of suspected neonatal sepsis:
- Ampicillin + gentamicin is recommended as empiric therapy rather than monotherapy to broaden coverage. [4]
Indications for Escalation and Additional Testing
Escalation is indicated when any of the following are present:
- Ill appearance or clinical instability. [2]
- Suspected meningitis physiology or neurologic signs, which increases the need for CSF evaluation and CNS-active empiric coverage. [2]
Lumbar puncture is recommended in the neonatal febrile evaluation pathway. [2]
Treatment Monitoring and Culture-Directed De-escalation
Culture results should be used for de-escalation:
- Blood, urine, and CSF cultures guide narrowing or discontinuation based on organism identification and susceptibilities. [2]
Empiric antibiotic exposure should be reassessed when cultures do not confirm infection. [4]
Targets and Clinical Goals of Management
The clinical goals are:
- Prompt identification of invasive infection using cultures and CSF when indicated. [2]
- Rapid empiric coverage until serious bacterial infection is excluded or confirmed. [4]