· just now. Report Abuse. Roundworms are transmitted when dogs eat dirt or feces contaminated with roundworm eggs. Humans can get roundworm, too, so--as if you need reminding--always wash your hands after handling dog feces, and don't allow children to play near soil where dogs have pooped. just now. Report Abuse. Roundworms are transmitted when dogs eat dirt or feces contaminated with roundworm eggs. Humans can get roundworm, too, so--as if you need reminding--always wash your hands after handling dog feces, and don't allow children to play near soil where dogs have pooped.