Cat Ringworm

" Cat ringworm is a fungal infection that can be contracted at any age and is more pronounced in younger cats. Infected areas may look like the hair has been shaved with skin looking red and crusty. The condition is easily treated with skin ointments or oral medications although the length of treatment could take weeks or months. "

Cat Ringworm is not a worm, but a fungal infection technically called dermatophytosis. It’s called ringworm due to its appearance - in humans, it appears as a crusty red circle with a pale center. That’s right, people can get ringworm, too. You can get it from your cat, or she can get it from you. If you have symptoms of ringworm, you should see a doctor for treatment. (Don’t worry, it’s easy to treat).

Picture Kitten Ringworm

Picture Kitten Ringworm

While any cat can get ringworm, some are more susceptible than others. Young kittens, long haired cats, cats in crowded conditions such as shelters, and those with other health problems are more likely to contract the disease. Some cats may be carriers without having any symptoms. They can still pass the disease on to others.

The fungus grows down from the base of a growing hair shaft (cuticle).

Ringworm Symptoms in Cats

In cats, ringworm symptoms appear a bit differently than in humans. It generally appears as dry, red or gray scaly round patches with embossed edges. Your cat may appear to have dandruff. There may be some hair loss in the area (alopecia) such as if the hair in the area has been shaved. It’s generally not too itchy, but your cat may scratch or lick at the area.

The condition can appear on any part of your cat's body but is usually seen on the front paws, tail, head and ears.

Picture of Ringworm in Cats

Diagnosing Cat Ringworm

Feline ringworm can resemble other skin problems, so your vet may need to do some tests in order to make a diagnosis.

The first thing your vet may do is examine your cat’s skin under a Woods light. Ringworm will generally fluoresce under the light. However, some species of ringworm do not fluoresce, and some other types of infections may fluoresce, so other tests may be needed in order to confirm the diagnosis.

Your vet can examine some hairs from your cat under a microscope for ringworm spores. However, spores can be very difficult to see, for if they are not observed, this does not mean your cat does not have ringworm.

A fungal culture will identify ringworm and other fungal infections. The disadvantage to this method of diagnosis if that it take about ten days. However, if the above methods don’t work, it may be necessary.

Ringworm Treatment for Cats

Ringworm can be difficult to treat and should involve a consultation with your veterinarian.

Ringworm treatment for cats is generally treated with a combination of oral and topical medications. Preference is for oral medications and the use of a lime sulfur dip such as Dermisil for Ringworm. Topical ointments are often not as effective since your cat will be tempted to lick it off.

The oral cat ringworm medication of choice is Itraconazole. Other options include Ketaconazole and Griseofulvin. Griseofulvin is usually not used since it is associated with side effects in some cats.

You can also try a natural cleanser that is safe for cats such as Clenzor and a natural ringworm remedy such as Ring-Ex for cat ringworm which contains ingredients combined specifically to help with cat ringworm.

You’ll also need to treat the environment, because otherwise your cat will just become re infected and the problem could spread to you. First thoroughly vacuum all areas which will pick up infected hairs and skin flakes. You can also mop the surfaces of your home with a product that uses disposable pads such as a Swiffer. Do not touch the pads after cleaning.

To disinfect surfaces in the home, purchase a product that contains Benzalkonium Sulfate such as Benzarid. Other options include chlorine bleach (diluted 1 part bleach to 10 parts water), or a strong detergent. Note that products which contain chlorheidine or povidone iodine are not as effective as other approaches.

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References:

Marvistavet

Ringworm Infection in Dogs and Cats
R.A. Cervantes Olivares
Departmento de Microbiologia and Inmunologia
Laboratorio de Micologia, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autonoma de Mexico, Mexico DF, Mexico

Washington State University College of Veterinary Medicine