My dog completed heartworm treatment but is still positive. What now?

A "low positive" may mean a low adult heartworm burden. The preventive is to kill any immature heartworm (microfilariae). The doxycyline is to kill the wolbachia bacteria. This is an organism that lives within the heartworm parasite as a symbiont. This portion of the treatment lasts 30 days after which medication is given via injection to kill adult heartworm. Treatment is outlined at the link below. https://d3ft8sckhnqim2.cloudfront.net/images/pdf/HeartwormTreatmentGuide_PetOwnerColor.pdf?1561720859

Yes, that is true! While under heartworm treatment, Charlie should not be on a heartwood preventative. Once he is cleared of heartworms, it will be safe to start him on a preventative again to prevent him from getting heartworms again. Best of luck.

There is really only one treatment for adult heartworm disease which is given by injection. The other method is just continuing to use preventative medications so they don’t continue to be bitten and infected with more heartworms. The hope is over time the worms will die. This may take years and the worms will continue to do damage to the body while they exist. Heartworm disease is complicated and devastating and the treatment does have the potential for side effects. If Scooby does have heartworm disease then a long conversation with your veterinarian about treatment plans would be advised. American heartworm society https://www.heartwormsociety.org. Has some great information and resources as well. Best of luck and thank you for using Pet Coach.

Some veterinarians treat heart worms with a slow kill method by giving heartworm prevention monthly which will kill the adult worms over time and prevent new ones. The more common treatment is with injections to kill the worms quickly. Both methods have advantages and disadvantages. Doing it with a slow kill method is much less expensive. The shots are expensive, can be painful and you would need to keep your dog very quiet for six weeks. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for Duke.

In depends on how severe the infestation is, but with the new treatment protocol most dogs recover eventually, it may take a very long time to finish the treatment course if the dog is heavily infested and you need to be very strict with physical activity as any excess in activity may put his life in danger as long as he is not cleared of this disease.

It sounds like you have gone through the appropriate steps and I suspect the parasites are now cleared. Of course you still need to go through the testing to be sure but this protocol generally works very effectively. Congrats! The hardest part is over! Remember though to continue her on strict rest until your veterinarian clears her for normal activity again. I hope this helps.

A Light positive is still a positive. I would ask your vet to send out test to an outside Lab to confirm the results using a different type of test. You can also have an ultrasound done to see if your dog has any adult worms at this time. Your dog should currently be a heartworm preventative every month like Heartgard. Most heartworm tests are actually looking for antibodies in the bloodstream, so when they come up positive (even light positive, this means that your dog has antibodies or that your dog has been exposed. It may be that your dog doesn't have any adult worms of his/her own at this exact moment, but that he/she has baby heartworms floating around in the bloodstream because he/she is constantly being exposed to them (be it from another dog in the area who is infected and mosquitoes are passing it around or you live in a rural area where there are a lot of coyotes who are infected?? These are very far fetched reasons.. The most likely cause is that your dog is infected but has what we call a "low case load" and is producing a small amount of antibodies and therefore shows a light positive. Further testing will show you how advanced the disease is (like I said, ultrasound, xrays, etc) but regardless, you should treat your dog. One heartworm WILL eventually become two, three four etc. The longer the problem is left untreated, the worse it will become and the more damage they will will do to your dog's heart, lungs and overall health.