After a child has a strep skin infection (impetigo), what is the time frame for PSGN to develop?

Post-streptococcal glomerulonephritis (PSGN) is a potential complication that can occur following infections caused by certain strains of Group A Streptococcus, such as those responsible for impetigo. The time frame for PSGN to develop after a skin infection like impetigo typically ranges from 1 to 3 weeks, with most cases being diagnosed around 2-4 weeks post-infection.

The specific answer of 3-6 weeks falls in the common range timing because while most cases are reported to appear within 1-3 weeks, it can take up to 6 weeks for PSGN to manifest after the initial infection has resolved. This is important for clinicians to note, as recognizing this possible complication can prompt timely evaluation and management of renal function in affected children.

In summary, the window for PSGN manifestation after a strep skin infection is commonly around 2-4 weeks, but given that PSGN can sometimes present later, the approximation of 3-6 weeks captures the range effectively, thus supporting the chosen answer.