The name comes from its characteristic appearance, being a red, raised, round ring markings on infected patients. Don’t be misled, however, ringworm is not caused by a worm, and the marks can vary.

Both of the fungi that commonly cause ringworm in cats and dogs can be shared with humans, however some are species specific.  

Transmission occurs through direct contact with an infected pet, person or contaminated object. Fungal spores can remain dormant on bedding and brushes for months, making infection possible long after it has been resolved on the patient.

It is possible for cats, dogs and humans to be in a carrier state of the disease and not show any symptoms. 

Coming into contact with ringworm spores does not always result in infection. Healthy adults are usually resistant to infection while the elderly, kids and adults with skin sensitivities are particularly vulnerable. A short incubation period of between 7-21 days exists between infection and development of signs.

So, how will you know if your pet has ringworm? The patient themselves won’t itch or scratch, however you might notice a crusty scaling to the skin and hair loss in certain areas as the fungi causes fragility in infected hairs. Usual locations for ringworm lesions are head, chest and forelegs. Your vet will use a special ultraviolet lamp to confirm cases.

Once diagnosed, treatment can be topical or oral. Environmental cleaning is recommended in conjunction with medical therapy.