roundworm eggs are so resistant to most stuff, even heat and cold, that the surest way to get rid of them is to burn whatever touched roundworm. For the things that cannot be burnt - boiling. Boiling water, or boil stuff in boiling water (e.g. even fabric, sheets, blankets can be boiled in water). Every time raccoons poop on my deck, I end up pouring pots and pots of boiling water on the spot, after cleaning the actual poop... that's why I insisted that the landlord do something to stop raccoons from coming here.
Raccoons are one of the major roundworm carriers, especially, in regard to squirrels. They told me that at the Wildlife Center, and then, i read about it, too. Nasty stuff. Once larvae start traveling through bloodstream, they get to the brain, affect central nervous system and that's the end...Sorry for all this upsetting info, but it's good to know what we are dealing with...
Sweet little Toby!
So, so pray and hope, deworming was timely!