Neonatal Necrotising Enterocolitis: Current Prevention Strategies

Necrotising enterocolitis (NEC) remains one of the most serious gastrointestinal emergencies in neonatal care. It primarily affects premature and very low birthweight infants, causing intestinal inflammation, tissue injury and, in severe cases, perforation, sepsis and death. Survivors may face prolonged hospitalisation, short bowel syndrome, neurodevelopmental concerns and feeding difficulties.

Prevention depends on a bundle of decisions made before and after birth. Antenatal corticosteroids, careful respiratory support, early breast milk, measured feed advancement, infection prevention and prompt recognition of deterioration all influence risk. No single intervention eliminates NEC, and local protocols need to reflect gestational age, birthweight, illness severity and available resources.

For Australian neonatal teams, prevention must work across metropolitan tertiary hospitals, regional units and retrieval networks. A very preterm infant born in a rural New South Wales town may require transfer to Sydney, while a baby in northern Queensland may be managed across long distances and different hospital services. Clear communication and consistent feeding documentation become especially important during these transitions.

The subject also sits within the wider scientific setting represented by the FAOPS 2020 congress site, which brought together perinatal and neonatal specialists before the Tokyo meeting was cancelled in April 2020. Current practice continues to evolve through collaborative research, bedside audits and careful interpretation of evidence from different neonatal populations.

Establishing risk before birth

The strongest prevention plan begins with antenatal care. When preterm birth is likely, corticosteroids reduce respiratory and other complications, while magnesium sulfate may provide neuroprotection at very early gestations. Maternal transfer to a tertiary perinatal centre can improve access to obstetric, neonatal surgical and retrieval expertise when time allows.

Clinicians should identify additional factors such as fetal growth restriction, absent or reversed end-diastolic flow, chorioamnionitis, prolonged rupture of membranes and severe maternal illness. These factors do not automatically require withholding enteral feeds, but they should prompt individualised planning. A written handover should state the intended milk source, starting volume, fortification approach and clinical signs that would trigger review.

Australian geography makes antenatal coordination particularly significant. A woman from regional Victoria or Western Australia may need transfer before delivery rather than after an extremely premature birth. In practice, this requires coordination among local maternity services, neonatal transport teams and tertiary units, with realistic planning for road, air and weather-related delays.

Human milk as the foundation

Mother’s own milk is associated with a lower risk of NEC than exclusive formula feeding and should be offered as soon as safely possible. Colostrum can be used for oral care in very premature infants, even when full enteral feeding is not yet appropriate. Early expression support, access to pumps and practical lactation guidance help protect supply during a stressful admission.

Small, frequent feeds of expressed breast milk may be introduced when the infant is haemodynamically stable and the clinical team considers the gut ready. Trophic feeding supports intestinal adaptation, although the exact volume and duration should follow local policy. Avoiding unnecessary interruptions matters because repeated fasting can reduce milk exposure and complicate nutritional progress.

When the mother’s milk is unavailable or insufficient, pasteurised donor human milk may be considered, especially for extremely preterm or very low birthweight infants. Availability varies between Australian states and hospitals, and families need clear information about screening, processing and supply. Human milk fortifier may be required to meet protein and mineral needs, with decisions guided by growth, biochemical results and unit protocol.

Families often need support with expression during long admissions, including when they return to work, travel from another town or care for children at home. Lactation services should explain safe milk collection, labelling, refrigeration and transport. Practical education is as important as written information, particularly when parents are exhausted or English is not their first language.

Feeding protocols and gut protection

Standardised feeding protocols can reduce unwarranted variation. They should define when to begin feeds, how to increase volumes, when to use fortifier, how to manage gastric residuals and which symptoms require immediate medical assessment. Protocols must still allow senior review for infants with evolving instability, significant ductal disease, severe growth restriction or suspected infection.

Routine measurement of gastric residual volume is increasingly questioned because residuals can lead to unnecessary feed cessation without reliably predicting NEC. Abdominal distension, tenderness, bloody stools, bilious aspirates, temperature instability, apnoea, lethargy and metabolic acidosis carry greater clinical significance when considered together. A change from baseline deserves assessment rather than reliance on a single threshold.

Human milk handling is a safety intervention. Expressed milk should be labelled accurately, stored at the correct temperature and matched to the intended infant. In busy neonatal intensive care units in Melbourne, Brisbane or Perth, barcode systems and independent checks can reduce administration errors. Local procedures should also address fortified milk, thawing, expiry times and contamination risks.

Nutrition plans need to balance intestinal protection with adequate growth. Prolonged parenteral nutrition carries risks, including line infection and cholestasis, while rapid advancement may be poorly tolerated in some infants. Daily review of feed tolerance, weight, urine output, electrolytes and protein delivery helps the team adjust gradually.

Probiotics and other targeted measures

Probiotics remain an area of active debate. Some trials and meta-analyses suggest that selected products may reduce NEC or late-onset sepsis in very preterm infants, but benefits vary by strain, dose, preparation and population. Product quality, contamination, storage and administration are important concerns, particularly for infants with central lines or severe immunological vulnerability.

Australian units should follow their own governance processes and current national or international guidance rather than treating all probiotic products as interchangeable. Commercial availability in the Australian market does not prove that a product has the same evidence as a trial formulation. The Therapeutic Goods Administration framework, hospital pharmacy oversight and informed parental discussion all matter when considering use.

Other measures have more consistent support within a broader care bundle. Avoiding unnecessary antibiotics protects the developing microbiome, while prompt treatment remains essential when infection is suspected. Caffeine for apnoea, gentle ventilation, prevention of hypoxia and hypotension, and careful management of patent ductus arteriosus may reduce physiological stress, although they are not specific NEC treatments.

Blood transfusion deserves a structured approach because transfusion-associated gut injury has been reported in some studies. Evidence is mixed, so units should use clear thresholds, minimise avoidable anaemia and observe infants closely around transfusion. Decisions should include respiratory status, symptoms, reticulocyte response and overall clinical condition rather than a haemoglobin value alone.

Infection control and the neonatal environment

NEC is influenced by the intestinal microbiome and the surrounding care environment. Hand hygiene, equipment cleaning, cohorting during outbreaks and prudent antibiotic prescribing reduce exposure to harmful organisms. Staff education should include milk preparation areas, shared equipment and the safe handling of expressed milk.

Human contact remains valuable. Skin-to-skin care, when clinically appropriate, supports parental involvement and may improve physiological stability and breastfeeding outcomes. In Australia, kangaroo care needs to be planned around privacy, staffing, incubator access and family travel. It should not be abandoned because a unit is busy; instead, staff can agree on safe windows and practical supports.

During influenza, respiratory syncytial virus or COVID-19 waves, visitor restrictions can affect bonding, milk expression and parental confidence. Infection prevention policies should be proportionate and communicate clearly how parents can remain involved. Telephone or video updates may help families who live far away, but they cannot replace bedside partnership.

The wider hospital environment also matters during emergencies. Australian neonatal services can face bushfires, floods, heatwaves and power disruptions. Guidance on disaster planning is relevant to maintaining incubator power, milk refrigeration, oxygen supply, staffing and neonatal transfers when normal systems are strained.

Monitoring, recognition and escalation

Prevention does not mean waiting passively for symptoms. Nurses and doctors should know each infant’s baseline abdominal appearance, stool pattern, feed tolerance, perfusion and respiratory status. A structured assessment helps identify subtle deterioration before perforation or overwhelming sepsis develops.

When NEC is suspected, feeds are usually withheld while the infant undergoes urgent clinical review, imaging and laboratory assessment. Management may include gastric decompression, intravenous fluids, antibiotics, parenteral nutrition and respiratory or circulatory support. Early consultation with paediatric surgery is essential if there is pneumoperitoneum, persistent deterioration or evidence of intestinal necrosis.

Abdominal radiography remains useful, while ultrasound can provide information about bowel wall perfusion, thickness, motility and free fluid where trained staff and equipment are available. No scan should override clinical judgement. A normal early image does not guarantee safety when the infant’s condition is worsening.

Australian hospitals should build escalation pathways that include regional clinicians and retrieval services. A deteriorating infant in a smaller unit may need rapid advice from a tertiary neonatologist and transfer to a surgical centre. Documentation should travel with the baby, including feed volumes, milk type, antibiotic exposure, transfusions, imaging and the timeline of symptoms.

Quality improvement and family partnership

NEC prevention improves when units measure their own outcomes. Useful indicators include NEC rates by gestational-age group, exclusive human milk at discharge, timing of first milk, central-line infections, antibiotic days, feed interruptions and unplanned transfers. Reviewing cases should focus on systems, communication and modifiable processes rather than individual blame.

Families should receive plain-language explanations of NEC risk and warning signs. Parents may notice increasing abdominal swelling, colour changes, reduced activity or feeding intolerance before a scheduled review. Their observations should be welcomed, recorded and acted upon. Information must be culturally safe and available through interpreters when needed.

Australian services can align quality work with national safety expectations, state perinatal networks and local research partnerships. A unit in Adelaide may share data with a tertiary centre in Sydney, while a remote service may contribute practical lessons about transport and continuity of care. Consistent definitions make these comparisons more useful.

Research priorities include better biomarkers, safer fortifier strategies, precision nutrition, microbiome-directed therapies and improved prediction for infants with fetal growth restriction. Future studies should report outcomes that matter to families, including survival without severe disability, growth, feeding, hospital days and long-term bowel health.

Reducing neonatal necrotising enterocolitis requires reliable everyday practice: support milk expression, use a clear feeding pathway, protect the microbiome, recognise change early and escalate without delay. Neonatal teams, maternity services, retrieval networks and families can review local data and strengthen one practical step at a time. For background on related neonatal follow-up, see jaundice follow-up guidance, then use current hospital policy and specialist advice to apply prevention safely in practice.