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Histolytica in cats.

Species: Cat
Breed: Tabby
Age: 2-5 years
My cat has low levels of histolytica. I was informed it was common and not necessary to treat at this time. If there were symptoms then it would become necessary they went on to say. I love my vet very much however it would seem to me that this should be medicated. Is it common that a cat or dog has this frequently? Will the animals immune system destroy it? Could I use Clindamycin to treat even though Metronidazole appears to be the drug of choice?


Online vet, Dr. Marie

Dr. Marie replied:

Hi and thanks for an interesting question. Histolytica is not something that is common in my area. In fact, I can't recall ever dealing with it.

As far as I can remember, when cats are treated for histolytica, the reason for treatment is mostly to reduce the symptoms. If Timmy doesn't have any symptoms then treatment probably would not do much.

However, I would like to do some more research for you. My main resource for finding case reports and the latest information on what other vets think about conditions like this appears to be down right now. I will probably have access after the weekend though.

At this point my answer would be to trust your vet's advice. However, give me a couple of days and I will give you a more in depth answer.

Thanks very much,
Dr. Marie


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Disclaimer: Although Dr. Marie is a qualified veterinarian, the information found on this site is not meant to replace the advice of your own veterinarian. AskAVetQuestion.com and Dr. Marie do not accept any responsibility for any loss, damage, injury, death, or disease which may arise from reliance on information contained on this site. Do not use information found on this site for diagnosing or treating your pet. Anything you read here is for information only.

Customer reply:

I don't have much money but I felt inclined to send you another $8 for the research. I am interested in what you find out. Thank you Dr. Marie.

Kindly,


Online vet, Dr. Marie

Dr. Marie replied:

Thank you so much for your patience and waiting for my response. I now have more information for you.

Histolytica (also known as Amebiasis) is quite rare. Your cat would have ingested a cyst from contaminated food or water and now the parasite is most likely living in another form called a trophozoite in the large intestine. In some animals this can cause serious diarrhea. But, in many animals there are no symptoms.

People can definitely get histolytica. However, they can't get it from cats or dogs. Cats and dogs only pass the trophozoite life form and not the cysts. A human has to ingest the cysts in order to get infected.

I did some more research to find out what the general consensus is amongst vets as to whether or not a cat with histolytica should be treated. My research is primarily on Veterinary Information Network where almost 50,000 vets collaborate and discuss their cases. What I found is that it is extremely rare for cats to be diagnosed with histolytica! Now I don't feel so bad for not knowing more about the condition. :)

The main problem here is that no one really knows whether metronidazole (or any other medication for that matter) is really effective against Amebiasis. It might be...but it might not. And giving metronidazole to a cat is not always easy. It tends to be a very untasty pill even when compounded or made into a liquid. It's not something that cats take well.

If this were my case I would be advising you to keep an eye on Timmy. If he developed watery diarrhea then I likely would go ahead and treat with metronidazole. But otherwise, I probably would not.


I hope this has helped. Please let me know if you have further questions.

Dr. Marie.



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Dr. MarieDr. Marie is a veterinarian who practices in a busy animal hospital in Ottawa, Ontario. She created Ask A Vet Question as a resource for good, accurate veterinary advice online. Dr. Marie treats dogs, cats, hamsters, guinea pigs, and rats. She has been a vet since 1999.

Is an online vet visit just as good as a trip to your veterinarian? No! But, many times, asking an online veterinarian a question can help save you money. While Dr. Marie can't officially diagnose your pet or prescribe medications, she can often advise you on whether a vet visit is necessary. You can also ask Dr. Marie for a second opinion on your pet's condition.