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Our vision:

A world without heartworms.

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

How do pets get heartworms?

Heartworm disease is a devastating disease that starts with a single mosquito bite. Learn how pets get heartworms—and how heartworms can be prevented.
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: If you're treating heartworm-positive dogs in your clinic, check out this tutorial with AHS past-president Dr. Stephen Jon…

by Heartworm Society