Abstract: 497 fecal specimens were collected from 5 randomly selected villages of Bama County in December 2011, and tested for Blastocystis hominis infection using improved centrifugal sedimentation with hydrochloric acid-ether. Data were analyzed by villages, gender, occupation, age groups and ethnic populations. The results showed that 215 people of 497 were positive, with a prevalence of 43.3%（215/497）. Pandang village had the highest infection rate of 55.7%（68/122）, significantly higher than the other villages（P<0.05）. There was no significant difference in genders, occupations, age groups and ethnic populations（P>0.05）.

Key words: Blastocystis hominis, Infection, Bama Yao Autonomous County