The sequential pathology of canine nephrotoxic glomerulonephritis was studied by light microscopy, immunofluorescence and electron microscopy. The disease was induced by intravenous administration of antiglomerular basement membrane serum, and experimental animals were examined from 4 h up to 60 days after administration of nephrotoxic serum. During the first few days there was extensive glomerular capillary necrosis and infiltration by neutrophils. This was followed by mesangial proliferation and glomerular scarring. Using immunofluorescence, nephrotoxic (rabbit) serum and host IgG and complement (C3) were detected in damaged glomeruli.
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