Ringworm is caused by a fungus, which makes fur fall out in round, quarter-sized patches. A lesion then forms which may appear crusty with shiny edges. These lesions can appear anywhere on the body, but are most frequently found on the head, face and paws. It is also possible for a dog to have ringworm without symptoms.
Human/ Animal Interaction
Humans and animals can infect each other with ringworm.
Diagnosis
A veterinarian often uses a Wood’s lamp (which uses ultraviolet light) to make the ringworm visible.
Treatment
A veterinarian chooses the method of treatment based on how a dog responds. She may start with an over the counter anti-fungal cream. If that isn’t effective, she may prescribe medication.
Contagion risk
Because the spores are airborne, they contaminate bedding, carpeting, furniture and the household environment. Cleaning and vacuuming to remove shed fur and skin is important.
Proper cleaning
Bleach in a 1:10 dilution will kill the spores. Quarantine of the infected animal may also stop it from spreading.
Risk Factors
Ringworm is a problem in kennel environments and breeding operations where there are a large number of dogs. It is also present on farms with large numbers of animals.
Resources
Ringworm Infections in Dogs and Cats
Treatment of Ringworm
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