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１９８８－１９９０年期间，我们采用卢戈氏碘液涂片法粪检原虫，共检查１６０７９人，查见原虫感染者２９６３例，其感染率为１８．４％。查见原虫９种，其感染率分别为：溶组织内阿米巴０．５％，结肠内阿米巴７．２％，布氏嗜碘阿米巴０．７％，微小内蜒阿米巴３．８％，哈氏内阿米巴０．３％，贾第虫４．６％，人芽囊原虫２．６％，人毛滴虫１．１％，结肠小袋纤毛虫０．０１％。各片区感染率分别为：城市为１０．０％，东海农业１８．９％，环湖牧区２２．６％，青南牧区２２．７％，４个片区感染率间差别有极显著意义。男、女感染率分别为１８．４％和１８．５％，两者间差别无显著意义。各民族人群的感染率分别为：汉族１３．３％，土族１４．４％，藏族２２．１％，回族２３．７％，蒙古族２７．７％，撒拉族５３．０％，各民族人群感染率间有极显著性差异。本次调查较全面地了解了本省人体肠道原虫的感染水平和分布特点。
During the period from 1988 to 1990, we used protozoa protozoa with Lugol’s iodine smear method. A total of 16 079 people were examined. 2963 cases of protozoal infections were seen, and the infection rate was 18.4%. Nine species of protozoa were found. The infection rates were 0.5% for Entamoeba histolytica, 7.2% for Entamoeba histolytica, 0.7% for Entamoeba hispidophila, and Ami for microscopic nevus. Bar 3.8%, H. aeba 0.3%, Giardia 4.6%, Blastocystis hominis 2.6%, Trichomonas viridis 1.1%, Colon pouch ciliates 0.01 %. The infection rate in each area was: 10.0% in urban areas, 18.9% in Donghai Agriculture, 22.6% in Hushui Lake and 22.7% in Qingnan Pastoral Area, and the difference in infection rates among the four areas was extremely significant. The male and female infection rates were 18.4% and 18.5%, respectively. There was no significant difference between the two groups. The infection rates of ethnic groups were: 13.3% of the Han nationality, 14.4% of the Tu nationality, 22.1% of the Tibetans, 23.7% of the Hui nationality, 27.7% of the Mongolian nationality, and 53.0% of the Salar nationality. There was a very significant difference in the infection rates. This survey gave a more comprehensive understanding of the infection level and distribution characteristics of human intestinal protozoa in the province.