Conclusion: The infection rates of Toxocara spp eggs in soil in Quang Ngai province were from 31.82 - 43.68% of dog raising households and from 5.22 - 12.39% of no dog raising households; in Dak Lak province, these rates were from 38.63 - 45.53% of dog raising households and from 12.5 - 27% of no dog raising households.