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for the 2022 Triennial Heartworm Symposium

More than a million pets in the U.S. have heartworms. But heartworm disease is preventable.

True to its mission of leading the veterinary profession and public in understanding heartworm disease, the American Heartworm Society sponsors heartworm education and research.

2019 Heartworm Incidence Map

No state is heartworm-free

An American Heartworm Society survey of approximately 6,000 veterinary practices and shelters determined that heartworm disease continues to be diagnosed in all 50 states.
Safely Transport Heartworm Positive Dogs

Safely transport heartworm-positive dogs

Rehoming. A move. Accompanying an owner on a trip. Such situations can mean that dogs diagnosed with heartworms must travel. The American Heartworm Society and the Association of Shelter Veterinarians recently released joint transport recommendations designed to safeguard the health of infected dogs while ensuring they do not become vectors for heartworm transmission.

Pet Owner Video Explaining Heartworm Disease

Search for heartworm resources

Looking for expert advice on treating complications of canine heartworm disease? Guidelines on feline heartworm diagnosis? A video or infographic to post on your clinic Facebook or Instagram page? Or a new exam room poster to print? Find the free heartworm resources you need in the AHS Heartworm Resource Center.

Heartworm Guidelines

Preventing, diagnosing and treating heartworms

The American Heartworm Society is the veterinary profession’s leading resource on heartworm information. Our guidelines for heartworm management in dogs and cats incorporate the latest science and expert recommendations.

Latest News

Twitter: @AHS_Think12

RT @AHS_Think12: Our compliance on heartworm testing is far greater than that of pets on preventives. How can we bridge that gap? Unfortu…

by Heartworm Society

RT @AHS_Think12: Could a heartworm vaccine be available in the future? By partnering with the Morris Animal Foundation, the AHS is helping…

by Heartworm Society