Digestive Diseases and Sciences

, Volume 60, Issue 12, pp 3728–3734 | Cite as

Multiple Opportunistic Pathogens, but Not Pre-existing Inflammation, May Be Associated with Necrotizing Enterocolitis

  • Steven T. Leach
  • Kei Lui
  • Zin Naing
  • Scot E. Dowd
  • Hazel M. Mitchell
  • Andrew S. Day
Original Article

Abstract

Background

Necrotizing enterocolitis (NEC) leads to significant morbidity and mortality in the neonatal intensive care unit. Although current evidence would suggest that bacteria contribute to the pathogenesis of NEC, no single bacterium has yet been identified.

Aims

The aims of this study were to investigate fecal S100A12 concentrations and the intestinal bacterial community in premature infants (24–32 weeks) and investigate any associations between the microbiota and the development of NEC.

Methods

Meconium and feces were collected from premature newborn infants (between 24 and 32 weeks gestation) over the first 4 weeks of life. Fecal S100A12 concentrations were assayed by immunoassay, and samples were subject to 16S rDNA analysis using next-generation sequencing techniques.

Results

Fecal samples were collected from four infants that developed NEC and 18 control infants. Prior to developing NEC, fecal S100A12 concentrations were not elevated; however, following NEC diagnosis, concentrations were highly elevated. The fecal bacterial communities of infants with NEC did not differ significantly from control infants. However, potentially pathogenic bacteria were detected in significantly more infants with NEC than in controls (p = 0.0007).

Conclusion

At birth, fecal S100A12 concentrations were not elevated in premature infants subsequently developing NEC in this cohort. Following NEC diagnosis, S100A12 concentrations were highly elevated, suggesting that this potentially could act as a marker of disease progression. Higher detection rates of potentially pathogenic bacteria in NEC infants suggest that a range of potentially pathogenic bacteria may collectively contribute to NEC pathogenesis.

Keywords

Necrotizing enterocolitis S100A12 Intestinal inflammation Opportunistic pathogenic bacteria 

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Steven T. Leach
    • 1
  • Kei Lui
    • 1
    • 2
  • Zin Naing
    • 3
  • Scot E. Dowd
    • 4
  • Hazel M. Mitchell
    • 5
  • Andrew S. Day
    • 1
    • 6
  1. 1.School of Women’s and Children’s HealthUniversity of New South WalesSydneyAustralia
  2. 2.Department of Newborn CareRoyal Hospital for WomenSydneyAustralia
  3. 3.Virology, Department of Microbiology, South Eastern Area Laboratory ServicesPrince of Wales HospitalSydneyAustralia
  4. 4.Molecular Research LP, MR DNAShallowaterUSA
  5. 5.School of Biotechnology and Biomolecular SciencesUniversity of New South WalesSydneyAustralia
  6. 6.Department of PaediatricsUniversity of OtagoChristchurchNew Zealand

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