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Is it safe to end cat ringworm isolation after one negative test?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | unneutered | 4 months and 7 days old

Hi I have a cat that has ringworm who we have done topical treatment for on the area for 7 weeks and we got a negative fungal culture result back is it ok to “un-isolate” him now?

1 Answer

Most Helpful Answer

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Answered By Sara Farmer, DVM

Veterinarian

Published on February 8th, 2020

I recommend waiting until there are two negative fungal cultures to reintroduce a cat with ringworm back into the household. I typically would culture again in about three weeks. Every vet has a different protocol that works for them however so ask your vet!

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