In order to survey the prevalence of Buxtonella sulcata in Kyonggi-do in 1984 and 1994, the feces of cattle were collected and examined. Of 792 cattle in 1984 and 293 in 1994, cysts of B. sulcata were detected from 266 (33.6%) and 101 (34.5%) cattle respectively. The positive rates were 85.9% and 64.2% in breeder cattle, 44.8% and 9.4% in dairy cattle, 7.5% and 14.9% in Korean cattle and 1.8% in beef cattle. In spring, the cyst positive rates were 62.5% in 1984 and 27.8% in 1994; 20.1% and 66.7% in summer; 21.3% and 0% in autumn; and 34.8% and 64.6% in winter. More cattle, 69.1% (184) and 55.5% (56) in 1984 and 1994, had diarrhea among the cyst positive cattle than those of cyst negative, 37.6% (198) and 32.3% (62).