What worms are in my boarded dog's stool? Do I need to clean yard?
Based on the photo, these look like tapeworm segments. Tapeworms are harder to kill than most other intestinal parasites, so in most states you will need to get a prescription dewormer from a vet to get rid of them.
As far as disinfection goes - tapeworms have an indirect life cycle, so they cannot be contracted directly from coming into contact with an infected dogs feces. Dogs normally get them either from swallowing a flea, or from eating roadkill or some type of rodent. So you don't need to worry about your yard - the best way to prevent tapeworms is to keep your dog on a good quality flea medication, and keep them from eating dead things outside. They cannot get tapeworms directly from the ground, so this should not be a concern :)
Updated on September 23rd, 2025