PSGN diagnostic criteria definitions: A) Evidence type and B) case type.
| A) EVIDENCE TYPE | CRITERIA |
| Definitive evidence | Renal biopsy findings suggestive of PSGN |
| Clinical evidence (minimum 2) | Edema Moderate hematuria on urinalysis Hypertension |
| Laboratory evidence (all 3) | Hematuria on microscopy Evidence of recent GAS infection Reduced C3 level |
| Expert opinion | Diagnosis of PSGN made by a pediatrician or nephrologist |
| B) CASE TYPE | CRITERIA |
| Confirmed case | Biopsy findings or clinical evidence plus laboratory evidence |
| Probable case | Clinical evidence only |
| Possible case | Laboratory evidence only or expert opinion |
C3–complement component 3, GAS–group A streptococcus, PSGN–poststreptococcal glomerulonephritis.