I wouldn't be too psyched about using the dogshit-fueled castings in the veggie garden. I was just trying to get rid of the turds and was surprised to find black granular castings in there, then when I found the worm orgy I realized what was happening. There was a huge worm population because the landlord kept dumping 6 inches of mulch over half the yard every year.
Nature has some wild stuff, you should always wash your hands well after gardening in outdoor soil. On "Monsters Inside Me" there was a show on some little girl in Oregon that got a horrible parasite from gardening...probably from coyote or fox shit randomly dropped in the garden. She ate after gardening without washing her hands.