Occurrence of acute glomerulonephritis in sibling contacts of children with sporadic acute glomerulonephritis.

Additional cases of acute glomerulonephritis in sibling contacts were observed in from one fourth (proven by renal biopsy) to one half (proven and suspected) of the index case sibships examined. These data suggest that the occurrence of acute glomerulonephritis in family contacts of children with sporadic acute poststreptococcal glomerulonephritis is so common as to warrant close observation of the other siblings.