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KembaraXtra -Medicine- Neonatal Sepsis
Neonatal sepsis is a life-threatening systemic infection occurring in newborns, most commonly within the first month of life and rarely up to three months of age. It is predominantly bacterial in origin, with pathogens typically acquired from maternal perineal flora during or around delivery. The incidence is approximately 3–5 cases per 1,000 live births, and despite advances in care, neonatal sepsis remains a major cause of morbidity and mortality. Early recognition is critical because clinical signs are often subtle and rapidly progressive.
The etiology is most commonly bacterial, with Group B Streptococcus, Escherichia coli, and Listeria monocytogenes being the leading pathogens. Other bacterial causes include coagulase-positive and coagulase-negative Staphylococcus species and Treponema pallidum. Viral causes, though less common, include herpes simplex virus, enteroviruses, adenovirus, and cytomegalovirus, while fungal infections such as Candida species are typically seen in premature or immunocompromised infants. Infection may progress to meningitis, which carries a higher risk of long-term neurologic sequelae.
Risk factors are divided into perinatal and neonatal categories. Perinatal risk factors include maternal fever, urinary tract infection, chorioamnionitis, prolonged rupture of membranes exceeding 18 hours, foul lochia, uterine tenderness, and intrapartum asphyxia. Neonatal risk factors include prematurity, fetal tachycardia, male sex, twinning, congenital immune or metabolic disorders such as galactosemia, congenital anomalies, omphalitis, and prior intramuscular iron administration. The presence of any risk factor should significantly lower the threshold for evaluation.
Clinical presentation is often nonspecific. Caregivers may report poor feeding, lethargy, or irritability. On examination, infants may appear toxic with temperature instability, apnea, bradycardia, tachycardia, tachypnea, prolonged capillary refill, mottled or cyanotic skin, abdominal distention, jaundice, or bleeding. Severe disease may progress to septic shock, hypoglycemia, seizures, disseminated intravascular coagulation, cardiovascular collapse, and death if untreated.
Evaluation requires a full sepsis workup followed immediately by empiric antibiotic therapy. Bedside glucose measurement is essential. Laboratory studies include a complete blood count, inflammatory markers such as C-reactive protein, blood cultures, catheterized or suprapubic urine cultures, and cerebrospinal fluid studies when the infant is stable. Additional tests include arterial blood gas analysis, electrolytes, calcium levels, coagulation studies when indicated, and chest radiography to assess for pneumonia.
Management begins with stabilization of airway, breathing, and circulation, including ventilatory support when needed and prompt intravenous access. Empiric antibiotics are initiated immediately, most commonly ampicillin combined with gentamicin or cefotaxime, with vancomycin added if clinical deterioration or resistant organisms are suspected. Supportive care for shock, metabolic derangements, and organ dysfunction is provided as required.
All infants with suspected neonatal sepsis must be admitted for intravenous antibiotics, close monitoring, and supportive care. In practice, any infant younger than one month presenting with fever is generally admitted even if suspicion for sepsis is low. Prognosis depends on the timeliness of treatment, the causative organism, and the presence of complications, emphasizing the importance of early recognition and aggressive management.
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