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Methicillin-resistant Staphylococcus aureus-related glomerulonephritis in a child

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Abstract

Background

Methicillin-resistant Staphylococcus aureus-associated glomerulonephritis (MRSA-GN), a syndrome in which superantigens play an important role in the pathogenesis of the infection, has been well described in adult patients but not previously recognized in children.

Case Diagnosis/Treatment

We report the case of a 6-year-old girl with MRSA-GN. She presented multiple malformations, including tracheal stenosis necessitating tracheotomy. She was admitted to our hospital because of acute pneumonia caused by a MRSA infection and was found to have proteinuria and abnormal renal function. MRSA was detected in her sputum, and this MRSA isolate produced toxic shock syndrome toxin-1, which acts as a superantigen and stimulates Vβ2+ T cells. A blood test revealed that the number of circulating Vβ2+ T cells expressing CD45RO, a marker of activation, was increased along with a concomitant elevation in the levels of serum immunoglobulins. Both are hallmarks of MRSA-GN. The eradication of MRSA using appropriate antibiotics resulted in the disappearance of the proteinuria; in contrast, corticosteroid treatment failed. To the best of our knowledge, this is the youngest patient to be diagnosed with MRSA-GN.

Conclusions

In summary, there should be a high index of suspicion for MRSA-GN, even in the very young, in order to avoid the unnecessary use of immune suppressants in this context.

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Acknowledgments

This study was partly supported by the Mami Mizutani Foundation.

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All of the authors declare that they have no competing interests.

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Correspondence to Kazunari Kaneko.

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Kimata, T., Tsuji, S., Yoshimura, K. et al. Methicillin-resistant Staphylococcus aureus-related glomerulonephritis in a child. Pediatr Nephrol 27, 2149–2152 (2012). https://doi.org/10.1007/s00467-012-2229-2

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  • DOI: https://doi.org/10.1007/s00467-012-2229-2

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