Heartworm Test Results In 10 Minutes Pet testing kits can be an easy and convenient way to confirm a pet diagnosis. Witness is a cutting edge manufacturer of a many types of pet test kits. WITNESS HW Heartworm Canine/Feline Antigen Test Kit (10 tests) is an easy Rapid Immuno-Migration (RIM™) test that looks for the adult Dirofilaria immitis antigen that is associated with heartworm disease. It can be used with canine or feline plasma, serum or anticoagulated whole blood samples. It is easily manageable and only requires a small amount of contact with the animal. Benefits Straightforward test that needs only 15 seconds of animal contact You don?t have to wait around for the results ? they come in 10 minutes No refrigeration required ? test can be stored at room temperature Easy on your pet ? only requires 50 µl of sample.