The incubation period between exposure to ringworm and the development of symptoms is 7-21 days. This means if you pet a stray cat yesterday and have ringworm today, then that is not the most likely cause of your infection.

The most common symptom of ringworm in cats is no symptoms at all! But every cat is different and may or may not have one or many of the following signs of ringworm.

A ringworm lesion on a kitten.
  • No symptoms
  • Hair loss
  • Scaly, flaky skin patches.
  • Itching
  • Small itchy bumps on the skin
  • Broken hairs around the lesions.
  • Open sores
  • Scaly claws, malformed claws
  • Dandruff in the cat’s fur
  • Ringlike lesions on your cat’s skin
  • Small, thickened patches of skin

Kittens are most often infected as their immune systems aren’t fully developed. Kittens are also more likely to have more severe types of ringworm infections as well. Elderly cats and cats with a weakened immune system are often more likely to get ringworm.

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