Acute poststreptococcal glomerulonephritis (acute glomerulonephritis, acute nephritis, postinfection glomerulonephritis) is an immunocomplex disease with diffuse kidney damage, mainly of the glomeruli, which occurs 10-14 days after streptococcal infection (angina, impetigo, scarlet fever, pyoderma, etc.) and characterized by nephritic syndrome.