Kidney biopsy findings in poststreptococcal glomerulonephritis

(A) Light microscopy showing a proliferative (exudative) glomerulonephritis. Note numerous neutrophils within glomerular capillaries (Periodic acid Schiff, 40x).
(B) Immunofluorescence microscopy showing bright granular capillary wall staining for C3 (40x).
(C) Immunofluorescence microscopy showing bright granular capillary wall staining for IgG (40x).
(D) Electron microscopy showing a subepithelial electron dense deposit (subepithelial hump, 79900x).