Official guidelines from the American Heartworm Society
Guidelines for the Diagnosis, Prevention, and Management of Heartworm (Dirofilaria immitis) Infection in Dogs and Cats. For your convenience, guidelines are offered in both full and summary formats. These guidelines are living documents and are revised periodically based on information presented at the American Heartworm Society’s Triennial Symposium, new research, and additional clinical experience. The versions posted here supersede previous editions and have been peer reviewed by independent experts.