Is dog poop dangerous to humans?

The highest-risk group is small children, who play at ground level and put hands in their mouths. Toxocariasis — the infection caused by roundworm eggs — is diagnosed in the U.S. every year, and contaminated soil is a common route. Hookworm larvae go a step further and enter through bare skin, which is why walking barefoot in a contaminated yard is a real exposure.

The timeline is what surprises people. Waste breaks down visually within weeks, but roundworm eggs persist in soil for years and are resistant to most disinfectants. Removing waste promptly is the only practical control — once eggs are in the soil, you're waiting them out.

None of this makes a dog-friendly yard unsafe. It makes an unmaintained one unsafe. Consistent removal, keeping play areas away from the dog's preferred spots, and routine deworming from your vet cover the realistic risk.