is poststreptococcal glomerulonephritis primary or secondary glomerulonephritis

Poststreptococcal glomerulonephritis (PSGN) is considered a type of secondary glomerulonephritis. This condition occurs as a complication following an infection, typically of the throat or skin, caused by certain strains of Streptococcus bacteria, such as Streptococcus pyogenes. In PSGN, immune complexes formed in response to the streptococcal infection deposit in the glomeruli of the kidneys, leading to inflammation and impaired kidney function.

This distinguishes it from primary glomerulonephritis, which arises from intrinsic kidney disorders without a clear external infectious or systemic disease trigger. In summary, PSGN is characterized by its association with a prior streptococcal infection, placing it firmly in the category of secondary glomerulonephritis.