Eighty-four children with acute post-infectious glomerulonephritis were admitted to the Waikato Hospital in 1976-1980. The rate of admission, sex difference, and seasonal variation in admission numbers were similar to the pattern of the previous ten years. Only 11 children (13 percent) showed evidence of antecedent streptococcal infection, but there was evidence for a variety of other infections before admission. Clinical abnormalities had disappeared in the majority of 31 children reviewed at 48 months, although 20 percent had proteinuria. The long-term prognosis is yet to be determined for these children.