Why does my cat's ringworm still glow under UV after treatment?

Question

My cat has ringworm. She has the kind that is fluorescent under UV light. We have been treating my cat for over 2 weeks with cream, oral medication, and ketohex bath's. My question is, does ringworm still glow after the fungus is dead? If there are still small spots/hairs that are glowing, is the ringworm fungus still active? Pet's info: Cat | Domestic Shorthair | Female | spayed | 3 years and 11 months old | 12 lbs

Maria DVM · Accepted Answer

If the area is still glowing even if you have treated for 2 weeks, I still recommend continuing treatment and would state that Chloe does in fact still have ringworm. I have seen some animals needing treatment for 4-6 weeks with oral medication and topical. Sometimes scabs and dandruff can glow under the light and it can appear that the area is glowing when in fact it is just the scabbing or dandruff. If it is truly the skin lesion then I typically have clients treat for another 2 weeks and recheck again. I hope Chloe feels better soon and thank you for using Petco Pet Education Center, formerly Petcoach.

Why does my cat's ringworm still glow under UV after treatment?

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