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Vaccinated my cat with ringworm. Will vaccine worsen condition?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | unneutered | 4 lbs

Mochi had recurrent ringworm, and in Early October he was suffering from FPV. He is as healthy as ever now, and it doesnt seem like he has ringworm anymore. So today I vaccinated him. He doesnt like vets, although i have made him familiar with the carrier/played with him at the clinic before meeting the dr. He was so aggressive and traumatized that he pooped and urinated. I bathed him right after and noticed a bald spot. Is is bad that i vaccinated him when his ringworm hasnt subsided?

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1 Answer

Most Helpful Answer

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Answered By Daniel Fonza, DVM

Veterinarian

Published on November 17th, 2017

Hi there and thank you for using pet coach to address your concern. The vaccination should not overwhelm his immune system enough to be worried about the ringworm worsening. As long as he is on treatment for the ringworm and it doesn't worsen after the vaccine, he should be absolutely fine. It sounds like he is not on treatment so I would make sure to contact the vet who last saw him so that you can start treatment if this is ringworm. There is a chance this is not ringworm at all and just an areas Kochi scratched at as well. I have vaccinated cats with skin infections and ringworm before and have never noticed that the infection worsened. There is always the possibility that it could worsen, but in my experience, this is not very common for it to worsen after receiving a vaccination. I hope this helps guide you in the right direction. Please do not hesitate to contact me with any further questions or concerns you may have.

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