The hypercellularity of post - streptococcal glomerulonephritis is due to increased numbers of epithelial , endothelial , and mesangial cells as well as neutrophils in and around the capillary loops 链球菌感染后的细胞大量增生,表现为在毛细血管袢内及周围的血管内皮细胞、系膜细胞增生,伴中性粒细胞和巨噬细胞浸润。