Your preventative works by killing the larvae that have infected your dog during the PREVIOUS 30 days. Many people think it protects for the next 30 days, but it doesn't. If you are not consistent with your preventative, it is possible that some larvae may reach the stage which is not affected by the preventative.
How long does it take for heartworms to dissolve after treatment?
Once treated, the heartworms die slowly and begin to dissolve, taking several weeks. Three to four weeks later, your dog will begin phase two to get rid of the baby heartworms.
How soon after heartworm treatment will a dog test negative?
While 100% of adult worms might be dead at the 6-month point, residual heartworm antigen in circulation is detectable for a time and could lead to an invalid test result. Waiting an additional 3 months allows time for the antigen to be cleared from the dog.
How do you know if heartworm treatment worked?
Test (and prevent) for success. Approximately 6 months after treatment is completed, your veterinarian will perform a heartworm test to confirm that all heartworms have been eliminated.
What is the success rate of heartworm treatment?
A new drug is available that does not have as many side effects, allowing successful treatment of more than 95% of dogs with heartworms. Many dogs have advanced heartworm disease at the time they are diagnosed.
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