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How long after heartworm treatment will dog test positive?

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Heartworm antigen testing is the most reliable method of confirming that all of the adult heartworms have been eliminated. Although many dogs are antigen-negative 16 weeks after treatment, it can take longer for the antigen to be completely cleared from some dogs.


How long after heartworm treatment will test be negative?

A: This scenario is uncommon, but it does happen. It is important to know that the heartworm test can remain positive for four-six months following treatment even if all worms were killed, so review the time line of your dog's therapy.

Do dogs go back to normal after heartworm treatment?

Your veterinarian should retest your dog for heartworm disease in 6 months. Usually, your dog can slowly resume activity at this time. Remember that every dog living in an area where heartworms exist needs to receive regular heartworm preventative (usually once monthly, given orally at home).

How long does it take to clear heartworms?

The treatment for heartworm disease takes at least 60 days to complete and consists of a series of drug injections that kills the worms.

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