My cat has a sudden eye lesion. Is it ringworm? What causes green glow?

Can be but may not be. Your vet can use a woods lamp to see if it glows green. If it does then it is ringworm. If it does not then it still can be ringworm but may not be. There is a fungal test to confirm if it is or not. Does anyone in your home have lesions? I would also recommend skin scraping the area looking for mites if it is just hairloss and not scabbing also. Mia needs to have a vet physically examine this area and the rest of her to see exactly what is going on. Ringworm can be treated topically if just one location with an anti-fungal cream. I also recommend ecollars after applying the cream so they do not lick the areas. If it is more than one location then I recommend oral anti-fungal medications. Thank you for using Petco Pet Education Center, formerly Petcoach.

It is very common for scabs/debris around the site to glow a bit under the lamp. A positive result would be fluorescent hairs from a metabolite the fungus secretes on to the hairs. Unfortunately only half of the strains of the most common cause of ringworm will glow however. A DTM medium fungal culture is a good way to diagnose ringworm but false negatives are always possible with any test. DTM medium is nice because it contains a color indicator as well. If the index of suspicion is high for ringworm another culture could be performed making sure to pluck hairs from many different sites. It is also possible that this is not ringworm but some other skin related issue of which there are many (secondary infections (bacteria, yeast), allergy (food, hypersensitivity), etc. I hope his helps and thank you for using Petco Pet Education Center, formerly Petcoach!

I'm really sorry but it is impossible to tell anything from the photos. I do appreciate you trying to post them though! They are very grainy especially when I try to enlarge them. I can't tell if it is a wound, a ringworm lesion or what. I don't think I would be "worried" but I would concerned enough to get her to your vet for an exam. If it is ringworm, it can be transmitted from cats to humans. You need to know what the lesion is before starting any treatment. You are welcome to post again with better photos but please understand it is impossible for us to diagnose (and it is also against the law) over the internet so you will likely get the same response. Best wishes.

Hello. Without an actual hands on diagnosis, it is difficult to tell exactly what this is, but it does resemble a condition call eosinophilic plaques. If this is what you are dealing with, the condition is frequently associated with underlying allergic disease & tend to respond very quickly to glucocorticoids. The allergies can be to fleas, food, something in the environment & even other insect hypersensitivities like to mosquitoes. The cornerstone to therapy is trying to identify & manage the underlying cause(s). If this is done, the prognosis is excellent for a very manageable condition. Thanks for using Petco Pet Education Center, formerly Petcoach.

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.

That does not look like a typical ringworm lesion to me. It is too angry and red. That being said- self trauma can make a lesion look horrible. Skin lesions can be bacterial, fungal, foreign objects, insect bites or secondary to allergies. I would recommend taking Simba in to a veterinarian. They can do an exam and some diagnostics to discover the cause. That lesion could be bacterial. Once they get a diagnosis, they will get him a treatment plan to get him feeling better. Thanks for reaching out to Petco Pet Education Center, formerly Petcoach!

Thanks for using Petco Pet Education Center, formerly Petcoach! This could be ringworm which is a fungal infection which needs to be treated and also can be contagious to humans. I highly recommend that you have her evaluated by your veterinarian for further assessment and treatment. Also, avoid contact with this lesion for now. Good luck!