Clinical Course and In-Hospital Complications of Fungal Sepsis in a Very Preterm Infant: A Case Report

Technical Summary: Clinical Course and In-Hospital Complications of Fungal Sepsis in a Very Preterm Infant

Problem Statement
Fungal sepsis represents a life-threatening complication in neonatal intensive care units (NICUs), particularly affecting very low birth weight and preterm infants. The condition is driven by immune immaturity, prolonged exposure to broad-spectrum antibiotics, invasive mechanical ventilation, and central venous access. Candida albicans is identified as a primary pathogen responsible for late-onset neonatal sepsis in this population. Beyond the infection itself, very preterm infants face high risks of concurrent neurological injuries, such as intraventricular hemorrhage (IVH) and posthemorrhagic hydrocephalus, which significantly compromise neurodevelopmental outcomes. This paper addresses the complex clinical management required when fungal sepsis co-occurs with severe systemic and neurological morbidity.

Methodology
This study employs a single-case report design to document the clinical course of a female neonate born at 30+5 weeks of gestation via cesarean section with a birth weight of 1370 g. The infant was admitted to the NICU immediately following birth due to respiratory distress. The methodology involved comprehensive clinical monitoring, laboratory investigations, microbiological cultures, and advanced imaging diagnostics throughout the hospitalization. The management strategy was multidisciplinary, involving specialists in neonatology, neurology, cardiology, ophthalmology, and neurosurgery. Diagnostic protocols included serial cranial ultrasounds, CT, and MRI to assess neurological status, alongside blood and cerebrospinal fluid (CSF) cultures to identify infectious agents.

Key Results
The neonate's clinical trajectory was characterized by a cascade of severe complications:

• Respiratory Course: The infant initially presented with Respiratory Distress Syndrome (RDS), requiring non-invasive support (bubble CPAP) and surfactant therapy via the LISA technique. Due to recurrent apnea and deterioration, the patient escalated to invasive mechanical ventilation (SIPPV + VG mode), followed by a prolonged weaning process involving SIMV, non-invasive ventilation, and high-flow nasal cannula.
• Infectious Complications: The patient developed late-onset neonatal sepsis caused by Candida albicans, confirmed by positive blood and CSF cultures. Inflammatory markers were markedly elevated (CRP up to 157 mg/L). Treatment involved an initial course of intravenous fluconazole, which was escalated to Amphotericin B due to persistent infection risks. The patient also required multiple courses of broad-spectrum antibiotics (including ampicillin, gentamicin, meropenem, vancomycin, colistin, and piperacillin-tazobactam) for suspected bacterial sepsis, a factor noted to predispose the infant to fungal infection.
• Neurological Complications: Neuroimaging revealed bilateral intraventricular hemorrhage (more pronounced on the right), progressive periventricular echogenicity, ventricular dilatation, and periventricular leukomalacia (PVL). The clinical course was complicated by meningitis and posthemorrhagic hydrocephalus, necessitating neurosurgical consultation.
• Systemic and Other Complications: Additional morbidities included congenital cataract of the left eye (leukocoria), patent foramen ovale (PFO), and patent ductus arteriosus (PDA) managed conservatively with ibuprofen. The infant also suffered from anemia of prematurity requiring multiple transfusions, hypoalbuminemia, and electrolyte imbalances.

Key Contributions
The paper contributes a detailed account of the interplay between fungal sepsis and severe neurological injury in a very preterm infant. It documents the specific therapeutic escalation from fluconazole to Amphotericin B in the context of CNS involvement. Furthermore, it highlights the necessity of a coordinated multidisciplinary approach to manage the convergence of respiratory failure, fungal meningitis, hydrocephalus, and congenital anomalies (cataract, cardiac shunts) in a single patient.

Significance and Claims
The authors assert that this case underscores the extreme fragility of the very preterm population and the critical importance of early diagnosis and intensive monitoring. The paper claims that the coexistence of fungal sepsis (specifically with CNS involvement like meningitis) and neurological injuries (IVH and hydrocephalus) significantly worsens prognosis and increases the risk of long-term neurodevelopmental impairment.

The study emphasizes that optimal outcomes in such high-risk scenarios rely on:

1. Timely recognition of sepsis and prompt microbiological diagnosis.
2. Immediate initiation of appropriate antifungal therapy.
3. A coordinated, multidisciplinary management strategy involving neonatology, neurology, neurosurgery, ophthalmology, and cardiology.

The authors conclude that despite advances in neonatal care, fungal sepsis and severe neurological injury remain major determinants of morbidity and long-term outcomes, necessitating aggressive intensive care and continuous monitoring.