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Ringworm in Dogs


In difficult cases your veterinarian may prescribe an antifungal drug called Griseofulvin. Ketoconazole, itraconazole, and other drugs of the imidazole group are also effective, but may not be approved by the FDA for treating ringworm in dogs. Griseofulvin, itraconazole, and ketoconazole have serious possible side effects and should not be given to pregnant bitches because they may cause birth defects. Antifungal drugs require close veterinary counseling and supervision.

Prevention: Ringworm spores can survive for up to one year and should be eliminated from the environment. Discard the dog’s bedding. Sterilize grooming equipment in a 1:10 dilution of bleach. Vacuum the carpets at least weekly to remove infected hair. Mop and wash hard surfaces (floors, countertops, dog runs) using diluted bleach. Technical Captan can be used as a spray in a dilution of 1:200 in water to treat a kennel.

There is a vaccine for cats for ringworm, primarily used in catteries with longstanding problems, but nothing for dogs at this time.

Strict hand-washing precautions are necessary to prevent human contamination. Children should not be allowed to handle pets with ringworm. Wash contaminated clothing and fabrics with bleach.


WebMD Veterinary Reference from "Dog Owner's Home Veterinary Handbook"


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