Well, I dont' think ringworm necessarily comes from animals. I've gotten a ringworm occasionally my WHOLE life. There is this picture of me when I was about 6 years old and I was COVERED in ringworm, ever since..I'll occasionally get one or two. Usually in the Spring. I think some people are just more sensitive to fungal stuff than others. I also got a nasty fungal infection from the nail salon pedicure bed (I'll never get a pedicure again!) I do think ringworm is more common with cats that dogs. (That's what I've heard, so correct me if thats wrong!)
Fleas? Gucci hasnt' had those, but I do think that is one great benefit of having a white/cream dog. lol You can see every little spec, stick, dirt, etc.
I wash her feet every day, atleast once. Always at night before bed, because she sleeps in my bed and we have white sheets
I dont know if you could see fleas on a black coat? Anyone? Maybe shine a flashlight? lol (lame advice, I know!) And she gets a full bath every week, but again...she's all over the bed and furniture and I have allergies, so I try to keep the allergens out of her coat. Especially pollen. She may get washed off more if the pollen gets crazy here...just so I can breathe!
I add garlic to some of Gucci's food. Supposedly, it helps repel fleas. I know all the "controversy" about Garlic, some people think its dangerous for dogs, but I do not feed her high levels of it, so I'm not worried about it hurting her, she likes garlic, actually. I'm not sure if it helps, but I like to think it does.
We also treat the yard for fleas!