This is what I have found....have you tried any of this? Hopefully someone with experience will be here soon! Good luck to you!
Treatment of Ringworm
If no treatment is carried out, ringworm will run it's course in two to four months and the symptoms will resolve themselves. However, treatment is recommended to save your dog from suffering any longer than necessary and to cut down the period of time they are contagious
Griseofulvin
Your vet may prescribe Griseofulvin for your dog. It is an anti fungal drug that is used for dogs with ringworm but it does have some side effects so be sure to consult your vet before giving any medication. Griseofulvin inhibits fungal reproduction.
Shampoos and Dips:
Lime sulfur dips are often recommended
Dips should be given twice a week and can be performed either by your vet or at home. Please be aware that Lime Sulfur will stain clothing and jewelry and will cause temporary yellowing of the dogs hair. It also smells very strongly of rotten eggs. Follow your vets instructions for mixing the dip.
Decontaminate the environment
Use bleach mixed at 1:10 on any surface that you can. It will kill 80% of the spores. Vacuum on a daily basis a dispose of vacuum bags which will contain the spores. Steam cleaning of carpets and furnishings will also kill a large number of the spores.
Don't forget your dogs bedding and kennel. Wash the kennel down with a bleach solution and wash the bedding in very hot water. If your dog is an inside dog confine him to one room of the house.