Identification

• Look for small patches of missing fur. These patches may or may not be circular and may or may not surround a red lesion. When these lesions occur on dogs, they are sometimes moist and appear inflamed, especially if the dog scratches and chews at them.
  Ringworm may cause only a patch or two at first, but usually spreads with time.
  Some types of ringworm fungus appear florescent under black light (ultra violet). To diagnose ringworm, your vet may use an ultraviolet light, called a "Woods lamp," or take a sample of the infected skin area for lab tests.
  
  

Prevention/Solution

• If your dog goes outside or is exposed to other animals, it isn't easy to prevent ringworm. Once ringworm occurs, it should be treated quickly to prevent spreading. Disinfect the dog's bedding and indoor environment with anti-fungal sprays designed for veterinary or kennel use. You can buy these at some pet supply stores online or offline.
  Your vet may tell you to wash your dog with Malaseb shampoo, which contains the anti-fungal medicine Miconazole. In addition, she may direct you to use anti-fungal creams or sprays. In some cases your veterinarian may prescribe an oral anti-fungal medicine, such as Ketoconazole, for your dog.
  
  

Time Frame

• Ringworm usually takes weeks, rather than days to clear up completely. The average time is about one to two weeks (if the dog is on oral anti-fungal medicine) to one and a half months of treatment. Even after the fungus has died, your dog will still probably have patchy spots until the fur grows back.
  
  

Warning

• Humans can contract this fungal infection from dogs and vice versa. Treat all cases of ringworm quickly and wash your hands after touching an infected animal.
  Some pets may be allergic to Ketoconazole and cannot take it. In addition, anti-fungal drugs can interact with other medications. Make sure to let your veterinarian know about any other medications your dog is taking.
  
  

Considerations

• Early stages of mange sometimes resemble ringworm. Since these conditions require different treatment, you should take your dog to a veterinarian for the right diagnosis and treatment.
  Frequent recurrences of ringworm indicates the spores are still living in the dog's environment (and these can live a long time) and may also indicate your dog has a weakened immune system.