Prevalence of viruses in stool of premature neonates at a neonatal intensive care unit

Authors

  • Zin Naing,

    1. Virology, Department of Microbiology, South Eastern Area Laboratory Services, Prince of Wales Hospital
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  • Benjamin Rayner,

    1. Virology, Department of Microbiology, South Eastern Area Laboratory Services, Prince of Wales Hospital
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  • Ananthen Killikulangara,

    1. Department of Newborn Care, Royal Hospital for Women
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  • Krishna Vunnam,

    1. Department of Newborn Care, Royal Hospital for Women
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  • Steven Leach,

    1. School of Women's and Children's Health, University of New South Wales
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  • Christopher J McIver,

    1. Virology, Department of Microbiology, South Eastern Area Laboratory Services, Prince of Wales Hospital
    2. School of Biotechnology and Biomolecular Sciences, Faculty of Science, University of New South Wales
    3. School of Medical Sciences, Faculty of Medicine, University of New South Wales
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  • Gillian M Scott,

    1. Virology, Department of Microbiology, South Eastern Area Laboratory Services, Prince of Wales Hospital
    2. School of Biotechnology and Biomolecular Sciences, Faculty of Science, University of New South Wales
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  • Maria E Craig,

    1. Virology, Department of Microbiology, South Eastern Area Laboratory Services, Prince of Wales Hospital
    2. School of Women's and Children's Health, University of New South Wales
    3. Institute of Endocrinology and Diabetes, The Children's Hospital at Westmead
    4. Discipline of Paediatrics and Child Health, University of Sydney, Sydney, New South Wales, Australia
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  • Kei Lui,

    1. Department of Newborn Care, Royal Hospital for Women
    2. School of Women's and Children's Health, University of New South Wales
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  • William D Rawlinson

    Corresponding author
    1. School of Medical Sciences, Faculty of Medicine, University of New South Wales
    • Virology, Department of Microbiology, South Eastern Area Laboratory Services, Prince of Wales Hospital
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  • Potential conflict of interest: Zin Naing et al. – no conflict of interest to declare.

Correspondence: Professor William D Rawlinson, Virology, SEALS Microbiology, Level 4, Campus Centre, Prince of Wales Hospital, Randwick NSW 2031, Australia. Fax: +61 2 93984275; email: w.rawlinson@unsw.edu.au

Abstract

Aim

Premature neonates represent a population highly vulnerable to infection. This study aims to profile viral colonisation of gut and the associated clinical manifestations among premature neonates admitted to a neonatal intensive care unit (NICU) in Australia.

Methods

In a cohort of 75 premature neonates born at less than 32 weeks gestation, who were followed for 4 weeks following admission to a NICU in Sydney, Australia, multiplex polymerase chain reaction assays were used to determine viral presence in stool, and clinical data were examined.

Results

Overall, viral RNA or DNA was detected in 24/419 (5.7%) of specimens, including norovirus genogroup 2 (1.9%), enterovirus (1.2%), herpes simplex virus-2 (1.2%), cytomegalovirus (0.7%), Epstein-Barr virus (0.5%) and rotavirus (0.2%). Viral infection was detected in 13/75 (17%) of premature neonates at some time point, including five (7%) neonates shedding more than one type of virus in stool. A higher rate of infection was observed among premature neonates with intrauterine growth restriction (56%) compared with those infants born appropriate for gestational age (12%. P = 0.006).

Conclusion

The overall viral detection rate in stool of 5.7% (affecting 17% of neonates) indicates viral infections are an important health risk for premature infants in NICU.

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