Companion Animal Parasite Council (CAPC) Practice Exam

Antigen testing or echocardiography is recognized as a common method for diagnosing heartworms in dogs due to its effectiveness in detecting the presence of adult heartworms.

The antigen test works by identifying specific proteins released by the female heartworm into the dog's bloodstream, which can be detected in a blood sample. This test is particularly valuable because it is both sensitive and specific, making it a reliable choice for identifying infections caused by Dirofilaria immitis, the scientific name for heartworms.

Echocardiography, on the other hand, allows veterinarians to visualize the heart and any potential presence of worms within the heart or pulmonary arteries through ultrasound imaging. This method is useful in assessing the severity of the infection and its impact on the heart's function.

Both methods provide valuable information that assists in diagnosing heartworm disease accurately and promptly, facilitating appropriate treatment for affected dogs.