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Cat still has roundworms after drontal treatment. | Ask A Vet
 

 


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Still has roundworms.

Species: Cat
Breed: DSH
Age: 1-2 years
My 2-year-old cat, Oliver, has been having a problem with roundworms. He was born outside and I adopted him from a shelter. Now he is strictly an indoor only cat, and I keep his litter box and my home very clean.

A few months after I adopted him in January 2010, he vomited out 3 roundworms. I immediately got him a Drontal treatment (two pills within three weeks) and then brought in a stool sample and it tested negative for eggs/parasites. 3-4 months later, the same thing happened; Oliver vomited out worms, he got dewormed, and then tested negative. I cleaned his litter box with bleach and threw away all his toys he carried around in his mouth.

A week ago, Oliver vomited out roundworms again! This is the third time that this has happened. I don't understand why he keeps vomiting out worms after his stool tests negative. Could you tell me what's going on with poor Oliver? I'm not sure if I should give him Revolution for the rest of his life or keep deworming him every few months.


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Online vet, Dr. Marie

Dr. Marie replied:

A cat can still have a negative stool sample even though they have parasites. This is because some parasites like roundworms can go through a stage where they don't lay eggs.

While Drontal is a good dewormer, if this were my case I would likely be using a different dewormer (such as milbemax) every 2 weeks for about 8 treatments, and then every 3 months.

Revolution is ok for roundworms but not the greatest.


---This question was asked in our Ask A Vet For Free section.---



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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.