GetTested’s Heartworm Test for Dogs is a rapid at home blood test that detects heartworm antigen from Dirofilaria immitis, the parasite that causes heartworm disease in dogs. Heartworm is spread by mosquitoes and can affect the heart, lungs and blood vessels. Early infection may cause few or no obvious signs, while later symptoms can include coughing, fatigue, reduced exercise tolerance, weight loss or breathing difficulty. The test gives a clear result in approximately 5 to 10 minutes, helping you quickly check whether heartworm infection may be involved.