Does my cat have feline leukemia?

have a 6 year old female cat with up to date FeLV and FIV vaccinations. She has the third eyelid showing in one eye and the cornea of the same eye is smaller than the other eye.

She has undergone 5 ELISA tests at 3 different laboratories - 3 positive and 2 negative.

Is it possible she does not have FeLV and has something else? If so what?

I am also considering strating interferon treatment for her - have had very good results with another cat, however, if she has no immuno condition, will the treatment effect her adversely?

Please be as thorough and exacting as possible in your response

To answer your questions.

1. She has not had an IFA test done yet. I just received the last ELISA test yesterday. The IFA test is the next step.

2.Currently she seems to be here own grouchy self. However, her issues started about 2 months ago:

i)she would eat and after a while vomit. We were told by the vet to give her 'Primperan' syrup every day for 3 days. It has worked.

ii)At the same time she would walk around the house trying to poop and/or urinate but could not. We took her to the vet and the vet undertook a blood count test that showed here white blood cells to be very low. She was put on antibiotics - Zinadol - twice a day for a week after which another blood test was done and showed all to be normal. The vet did an ELISA test and it was positive. The ELISA test was repeated by the same vet 2 weeks later and was again positive. Since then, a further 3 ELISA tests have been carried out by 2 separate laboratories - 2 negative and 1 positive.

iii) since then, she seems to be eating regularly and well - no apparent loss of apetite.

iii)the third eye lid of her right eye appeared about 1 month ago.

iv) about 5 days ago the pupil of her right eye suddenly became smaller.

v) currently, with the exception of here right eye, she seems like her old grouchy self.

3. Yes she does go out but we have given her vaccinations, which are up to date. I gave her a Drontal tablet for worms about 10 days ago as it appeared that she had worms - she did appear to be a bit more grouchy but after the tablet, she improved and eats better- and about 3 days ago I gave here a Stronghold spot on the back of her neck for parasites.

I hope this helps. If you need anything else please let me know.

Nick