Post-MRSA infection glomerulonephritis with marked Staphylococcus aureus cell envelope antigen deposition in

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Hirayasu Kai1, Yoshio Shimizu, Masahiro Hagiwara

  • 1Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba City, Ibaraki, Japan.

Journal of Nephrology
|June 1, 2006
PubMed

Insights

A patient developed severe kidney disease after a methicillin-resistant Staphylococcus aureus (MRSA) infection. Kidney biopsy revealed glomerulonephritis linked to the S. aureus cell envelope antigen.

Area of Science:

  • Nephrology
  • Infectious Diseases
  • Pathology

Background:

  • Post-infectious glomerulonephritis is a recognized complication of various bacterial infections.
  • Methicillin-resistant Staphylococcus aureus (MRSA) infections are increasingly prevalent and can lead to severe systemic complications.

Observation:

  • A 48-year-old male presented with massive proteinuria and renal dysfunction following MRSA pneumonia.
  • Renal biopsy demonstrated severe mesangiocapillary glomerulonephritis with crescents, IgA, and C3 deposition.
  • Immunostaining identified Staphylococcus aureus cell envelope antigen in the glomeruli.

Findings:

  • The histological findings were consistent with mesangiocapillary glomerulonephritis.
  • Immunofluorescence and immunostaining confirmed the presence of S. aureus cell envelope antigen within the glomerular lesions.
  • Electron microscopy revealed electron-dense deposits in subendothelial and mesangial areas, indicative of immune complex deposition.

Implications:

  • This case highlights a direct link between MRSA infection and glomerulonephritis.
  • The S. aureus cell envelope antigen is implicated as the causative agent in this post-infectious glomerulonephritis.
  • Understanding this association may guide diagnostic and therapeutic strategies for similar renal complications in MRSA patients.

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