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Bilirubin levels predict renal cortical changes in jaundiced neonates with urinary tract infection

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Abstract

Background

This study was undertaken to determine the incidence of urinary tract infection (UTI) and the frequency of anatomical abnormalities in newborns with unexplained jaundice and to find out if there is any correlation between bilirubin level and renal damage.

Methods

We studied 462 full-term neonates for UTI. They were aged 3–25 days, with either high (>10 mg/dL) or prolonged (>10 days) hyperbilirubinemia, with or without manifestations such as fever, vomiting, diarrhea, poor feeding, lethargy, and irritability. Neonates positive for UTI were further investigated with ultrasound, cystourethrography, and acute phase renal scintigraphy with technetium-99m dimercaptosuccinate acid (DMSA).

Results

Thirty neonates (6.5%) were found to have UTI. Twenty-eight of them had indirect hyperbilirubinemia and two had direct hyperbilirubinemia, with total bilirubin levels of 11.8–20.1 mg/dL. None of the neonates was found to have jaundice because of other reasons such as infection. Vesicoureteral reflux was found in 5 neonates and one of them was combined with hydronephrosis. Renal scintigraphy with technetium-99m DMSA showed renal cortex changes in 14 (46.7%) of the 30 neonates with UTI. These 14 neonates also had increased levels of bilirubin in comparison to those with normal findings of DMSA.

Conclusions

The incidence of UTI in uncomplicated neonatal jaundice is relatively high. Anatomical abnormalities of the urinary tract are not rare in infected children. Increased bilirubin levels are related to pathological findings in renal scintigraphy.

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Authors and Affiliations

  1. 3rd Department of Pediatrics, Aristotle University of Thessaloniki, Hippocration Hospital, Thessaloniki, Greece

    Ioannis Xinias, Vasiliki Demertzidou, Antigoni Mavroudi, Konstantinos Kollios, Panagiotis Kardaras, Fotis Papachristou & Ioannis Tsiouris

  2. Department of Nuclear Medicine, Aristotle University of Thessaloniki, Hippocration Hospital, Thessaloniki, Greece

    Georgios Arsos

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  1. Ioannis Xinias
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  2. Vasiliki Demertzidou
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  4. Konstantinos Kollios
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  5. Panagiotis Kardaras
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  6. Fotis Papachristou
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  7. Georgios Arsos
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  8. Ioannis Tsiouris
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Correspondence to Ioannis Tsiouris.

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Xinias, I., Demertzidou, V., Mavroudi, A. et al. Bilirubin levels predict renal cortical changes in jaundiced neonates with urinary tract infection. World J Pediatr 5, 42–45 (2009). https://doi.org/10.1007/s12519-009-0007-4

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  • DOI: https://doi.org/10.1007/s12519-009-0007-4

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