Onset: within 72 hours of birth — maternally transmitted organisms
Ascending infection from maternal genital tract or direct contact during delivery. GBS is the single most common cause of EOS globally. Listeria is rare but carries high mortality.
Onset: after 72 hours of birth — hospital or community-acquired organisms
Immature innate and adaptive immunity — reduced neutrophil function, low complement levels, limited maternal IgG transfer especially in preterm. Impaired phagocyte migration and oxidative burst.
Thin, fragile skin — especially in preterm neonates — permits direct bacterial translocation. Umbilical stump, IV insertion sites, and circumcision sites are entry portals.
Umbilical venous/arterial catheters, endotracheal tubes, and NG tubes all breach natural defences. Preterm gut epithelium is thin with poor tight junctions — susceptible to bacterial translocation, especially Gram-negatives.
Key principle: Neonates cannot localise infection. Any non-specific deterioration in a neonate should raise suspicion for sepsis until proven otherwise.
Vaginal and rectal swab at 35–37 weeks gestation for GBS colonisation. Practice varies across GCC countries — Saudi Arabia, UAE, and Qatar have adopted universal screening; others follow risk-based protocols. Positive swab triggers intrapartum antibiotic prophylaxis (IAP) with IV benzylpenicillin.
High rates of consanguineous marriage in GCC populations increase the risk of autosomal recessive primary immune deficiencies in neonates. Consider immune workup if sepsis is recurrent or unusually severe — especially combined immunodeficiency (SCID) or chronic granulomatous disease (CGD).
GCC NICUs report higher CoNS LOS rates associated with central line usage and long NICU stays. MRSA remains a concern in some regional centres — contact precaution protocols and active surveillance are key components of GCC NICU infection prevention bundles.
Large extended family visiting, cultural expectations around breastfeeding decisions, and gender preferences for nursing staff should all be considered when providing family-centred NICU care. Breastfeeding (or donor milk) is critical for gut microbiome protection.
| Investigation | What It Shows | Key Points |
|---|---|---|
| Blood Culture | Definitive organism identification + sensitivities | Obtain BEFORE antibiotics. Minimum 1 ml per aerobic bottle — volume critical in neonates. |
| FBC | Neutropenia (low WCC) or neutrophilia; thrombocytopenia | I:T ratio (immature:total neutrophils) >0.2 is a sensitive early marker in EOS. |
| CRP | Acute phase inflammatory marker | Rises 12–24h after onset — may be normal initially. Serial readings more useful than single value. Peak at 36–48h. |
| Blood Gas | Metabolic acidosis, lactate | Metabolic acidosis (base excess <-10) indicates severity. Lactate >2 mmol/L = tissue hypoperfusion. |
| Procalcitonin (PCT) | Bacterial infection marker — rises faster than CRP | Useful in early sepsis before CRP rises. Physiological peak at 24–48h post-delivery — interpret with caution in first 48h. |
| Lumbar Puncture (LP) | Meningitis — CSF white cells, protein, glucose, culture | Consider in ALL EOS and LOS if clinically stable. 30% of neonatal meningitis is missed if no LP performed. |
| Urine Culture | Urinary tract infection (LOS) | Catheter specimen only — suprapubic aspiration (SPA) acceptable. Bag specimen unacceptable due to contamination. |
| Blood Glucose | Hypoglycaemia / hyperglycaemia | Common in septic neonates. Monitor q1-2h initially. Target 2.6–8 mmol/L. |
Minimum 1 ml per aerobic bottle in neonates. Low blood volume submitted is the most common cause of false-negative cultures.
Repeat CRP at 18–24h after first sample and again at 36–48h. Two consecutive normal values in a well neonate supports antibiotic discontinuation.
The Kaiser Permanente Neonatal EOS Calculator is a validated tool that uses maternal and neonatal risk factors to calculate an individual probability of EOS per 1000 live births.
30% of neonatal meningitis is missed if LP is not performed. Blood culture alone is insufficient to rule out CNS infection.
Critical principle: Obtain blood culture BEFORE starting antibiotics. Document time of culture draw and antibiotic administration separately in the medication record.
First-line (NICE / most GCC centres): Benzylpenicillin + Gentamicin
Add Cefotaxime — crosses blood-brain barrier. Replaces or adds to gentamicin. Duration minimum 14–21 days for confirmed meningitis.
First-line (NICU, no MRSA concern): Flucloxacillin + Gentamicin
Substitute with Vancomycin + Gentamicin. Vancomycin is the drug of choice for MRSA and multi-resistant CoNS in NICU.
Gentamicin is nephrotoxic and ototoxic. Level monitoring is mandatory in neonates — renal excretion is immature and half-life is prolonged, especially in preterm infants.
Once-daily extended-interval dosing in neonates. Interval varies by gestational age and postnatal age — use local chart (typically 36h in <29 weeks; 24h in term).
Withhold next dose. Recheck level after 12h. Extend dosing interval. Discuss with pharmacist or neonatologist. Assess renal function — check urea and creatinine.
Prolonged antibiotic exposure in neonates is associated with disruption of gut microbiome development, increased risk of NEC, antibiotic-resistant organism colonisation, and adverse neurodevelopmental outcomes. Minimise unnecessary days of antibiotic therapy. Adhere to stop criteria. Avoid broad-spectrum agents when narrow-spectrum alternatives suffice.
Septic neonates lose thermoregulatory ability — incubator temperature must be adjusted frequently. Document temperature hourly and adjust servo-control or air temperature accordingly.
UVC is the preferred vascular access for sick term and preterm neonates requiring resuscitation or prolonged IV therapy. Position tip at junction of IVC and right atrium — confirm with X-ray before use.
Inspect every 1–2 hours for infiltration, phlebitis. Rotate sites per policy. Small gauge cannulae (24G) for neonates.
Give 10 ml/kg 0.9% NaCl over 30–60 min cautiously. May repeat x1 if poor perfusion. Avoid aggressive fluid resuscitation — neonates susceptible to pulmonary oedema and IVH.
Document respiratory rate, effort (recession, grunting), and SpO₂ every hour. Escalate early — neonates deteriorate rapidly.
Withhold or reduce enteral feeds in haemodynamic instability. Restart cautiously when stable — small trophic feeds (0.5–1 ml/kg/h) of expressed breast milk (EBM) preferred. EBM protects against NEC and provides immune factors.
Inform parents clearly and promptly about the diagnosis, planned investigations, and antibiotic treatment. Use interpreter services where needed. Avoid clinical jargon — explain what sepsis means in a neonate and the likely timeline.
Encourage skin-to-skin contact as soon as the neonate is clinically stable. Evidence shows KMC reduces infection rates, stabilises temperature, promotes breastfeeding, and improves neurodevelopment. Not appropriate during acute sepsis with cardiovascular instability.
DHA (Dubai), DOH (Abu Dhabi), MOH (Saudi Arabia), and MOPH (Qatar/QCHP) all mandate accurate contemporaneous nursing documentation. Neonatal sepsis is a high-risk clinical scenario with medico-legal implications — documentation standards must meet JCI and local accreditation requirements.
Never back-date or alter clinical records. If an error is made, cross out with a single line, sign, date, and time.
High morbidity condition. Approximately 20–50% of survivors have long-term neurodevelopmental sequelae. Early recognition and adequate antibiotic duration are critical.
Assess fontanelle tension at each observation. Bulging at rest (not crying) = raised ICP. Sunken fontanelle in dehydration. Document as: flat / tense / bulging / sunken.
Neonatal seizures are often subtle — eye deviation, lip smacking, cycling movements, apnoea with cyanosis. Document exact time, duration, type, and recovery. Notify medical team immediately.
Measure daily in meningitis. Rising OFC suggests hydrocephalus — complication of meningitis. Document on centile chart. Serial head ultrasound as per medical team request.
NEC is closely associated with late-onset sepsis in preterm neonates. Bacterial translocation through immature gut epithelium drives both conditions. Gram-negative organisms predominate.
Free air on AXR = perforation = surgical emergency. Notify surgeon immediately.
Coagulase-negative Staphylococcus (S. epidermidis) is the most common cause of LOS in NICU — predominantly catheter-related. Management involves a clinical decision about whether to remove or attempt to clear the line.
ECHO (echocardiogram) is recommended for persistent bacteraemia >72h to exclude endocarditis and intracardiac vegetation.
| Feature | Early-Onset Sepsis (EOS) | Late-Onset Sepsis (LOS) |
|---|---|---|
| Timing | <72 hours of life | >72 hours of life |
| Acquisition | Maternal — vertical transmission | Hospital / community — horizontal |
| #1 Organism | Group B Streptococcus (GBS) | CoNS (S. epidermidis — NICU) |
| Other Key Organisms | E. coli, Listeria | S. aureus/MRSA, Gram-negatives, Candida |
| 1st-line Antibiotics | Benzylpenicillin + Gentamicin | Flucloxacillin + Gentamicin (or Vancomycin) |
| Risk Factors | GBS+, PROM, maternal fever, prematurity | ELBW, central lines, prolonged NICU stay |
| Meningitis risk | GBS, E. coli K1, Listeria | S. pneumoniae, Salmonella, Candida |
| Presentation | Respiratory distress, shock — often acute | Subtle — temperature instability, apnoea, feeding intolerance |
Interval varies by gestational age — always use local neonatal dosing guideline chart. Do NOT dose by adult protocol.
Group B Streptococcus (GBS) — also known as Streptococcus agalactiae. Accounts for the majority of EOS globally and in GCC. Transmitted from maternal genital tract during labour or delivery.
Coagulase-negative Staphylococcus (CoNS) — most commonly Staphylococcus epidermidis. Predominantly catheter-related. Biofilm formation on intravascular devices is the key virulence mechanism.
Benzylpenicillin + Gentamicin — recommended by NICE (UK), followed by most GCC neonatal centres. Covers GBS (penicillin), E. coli and Gram-negatives (gentamicin). Add cefotaxime if meningitis suspected.
Minimum 1 ml per aerobic bottle — volume is critical in neonates because the bacterial load in neonatal bacteraemia is low. Inadequate volume is the most common cause of false-negative blood cultures.
30% of neonatal meningitis is missed if LP is not performed. Blood culture alone cannot exclude CNS infection. Neonatal meningitis may be present with normal blood cultures and minimal clinical signs.
Pre-dose trough <2 mg/L. Post-dose peak (1 hour after dose) target is 5–12 mg/L. Check first level before the second dose. If trough is elevated (>2 mg/L), withhold next dose and extend dosing interval.
Consider stopping antibiotics at 36–48 hours if: blood culture is negative, two serial CRP values are <10 mg/L, and the neonate is clinically well. Senior medical review required before stopping. This approach supports antibiotic stewardship in NICU.
Free air (pneumoperitoneum) on abdominal X-ray indicates bowel perforation — a surgical emergency. Also look for: pneumatosis intestinalis (air in bowel wall), portal venous gas (severe/late NEC). Notify surgical team immediately.