Image Description: This is a section from an infected kidney. On high magnification, the interstitium is edematous and heavily inflamed. Some of the tubules are filled with neutrophilic granulocytes (polys). The inflammation can destroy the tubules, forming abscesses. The presence of polys in the tubules is strong evidence of possible bacterial infection. Polys are seen in the interstitium/interstitial capillaries as well.