关键词: 肉芽肿病变, 超微结构, 血吸虫性, 肠上皮, 结肠, 微绒毛, 上皮细胞, 杯状细胞, 超微结构变化, 嗜铬细胞

Abstract: From dogs Infected successivcly with a total number of 900 cercariae of S. japonicum two ycars ago, sections of colonic mucosa with obvious granulomatous lesions were studied under electron microscope and compared with those of the healthy dogs. The results showed that the epithelial cells of the colonic mucosa selected from different sites with hypertrophict granulomatous and ulcerative lesions, had the characteristics of both proliferative and adcnomatous ccllular changes (Figs. 2-5). But, as comparel with the ultrastructure of the colonic cpithelium of the normal, the characteristics of the schistosomal lesions was more of the proliferative type rather than of carcinomatousone,