My dog's weak-positive heartworm Snap test: Treatment or prevention?

Question

My dog tested weak-positive for heart worms, what does this mean? The test that was used is Snap test. It was a lower shade of blue than the solid blue positive circle. Can I keep him on preventatives or is treatment necessary? At the same time I found out he also has whipworm which he is being treated for now, could this have altered the test? Thank you! Pet's info: Dog | Mixed Breed Large (61lb +) | Male | unneutered | 70 lbs

Dr. Strydom, DVM · Accepted Answer

The whipworm infection would not alter the Heartworm test results. The best thing to do in this case is to have your vet send off a confirmatory Heartworm test the lab. They use a different test method that is more accurate. That way you will know. My best guess is that he is positive though. Those snap tests are pretty accurate and there is a low likelihood of a false positive even if faint. After that your vet can tell you how to proceed with Heartworm prevention or the treatment.

My dog's weak-positive heartworm Snap test: Treatment or prevention?

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