What cause dark urine associated with acute poststreptococcal?

Dark urine in acute poststreptococcal glomerulonephritis is primarily due to the presence of hematuria (blood in urine) and proteinuria (excess protein in urine). The condition can result from an immune response to streptococcal infection, leading to inflammation and damage in the glomeruli of the kidneys. This damage allows red blood cells and proteins to leak into the urine, contributing to its dark color. Additionally, the breakdown of hemoglobin from red blood cells can also lead to darker urine.