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In the News

The American Heartworm Society is the leading resource on heartworm disease, and our mission is to lead the veterinary profession and the public in the understanding of this serious disease. Every year, hundreds of stories are written on the diagnosis, prevention and treatment of heartworm, as well as on the plight of affected pets. These stories are an important way of reaching both veterinary professionals and pet owners with information they need to know about heartworm disease.

The American Heartworm Society is led by a board of directors comprised of veterinarians and specialists in the fields of veterinary parasitology and internalmedicine. As leaders in the fight against heartworm disease, they are available as resources and authors of related stories.

Members of the media are encouraged to contact the American Heartworm Society for information, visuals and interviews about heartworm disease. Please contact Sue O’Brien at This email is for media inquiries only. All other inquiries, please email:



News & Alerts

New Heartworm Life Cycle Diagrams Released

A Picture is Worth a Thousand Words About Heartworm.

A clear understanding of the heartworm life cycle is vital in getting clients on board with year-round prevention, and pet owners who understand the rationale for your heartworm prevention and treatment recommendations are more likely to comply. Understanding, however, may require more than a verbal explanation of how heartworms are transmitted and develop.

Your Walls Will Talk — New Posters Promote Prevention During Heartworm Awareness Month

It's spring, and your schedule is booked with patients getting their annual exams, heartworm tests and heartworm prescription renewals.

And because April is also Heartworm Awareness Month, it's a prime opportunity to promote the importance of year-round protection for both dogs and cats. A new series of posters from the American Heartworm Society (AHS) uses compelling images and messages to remind pet owners that providing heartworm prevention is one of the most important—and most loving—things they can do for their pets.

Keep Your Treatment Protocol in Place; Adulticide Supplies are Available

Adulticide supplies are available for heartworm-positive dogs.

Reports about supplies of melarsomine have been in the news recently, which may be raising questions about whether supplies of the product are adequate. The news reports were triggered by a bulletin from the U.S. Food and Drug Administration (FDA) that announced their decision to approve a supply of product from Europe for use in the U.S. This was done to help ensure product availability until a supply of U.S.-made product is available.

Feline Heartworm Disease: Why You Should be Screening For It

(Appeared in Veterinary Economics)

You may be surprised to find the incidence of this often-fatal disease is higher than you think—even in your practice.

“You won’t find it if you’re not looking for it.” That’s what Dr. Robert Stannard, owner of Adobe Pet Hospital in Livermore, Calif., and secretary-treasurer for the American Heartworm Society, tells veterinarians when he’s asked about feline heartworm disease.

Leading off: Heartworm disease's long-term effects

(Appeared in Veterinary Medicine)

An overview of the highlights from the revised American Heartworm Society's canine and feline guidelines by Stephen Jones, DVM.

"As a veterinarian practicing in the Lowcountry of South Carolina, I deal with heartworm-positive patients nearly every day. Consequently, I've taken a special interest in the long-term effects of heartworm disease. Over the past six years, I have studied necropsy results from dozens of canine and feline patients that either had an active heartworm infection at the time of death or had been treated for heartworm disease during their lifetime..."

April is Heartworm Awareness Month

(Appeared in Fidose of Reality)

Heartworms kill a great number of dogs. In fact, the American Heartworm Society reports that more than one million dogs currently have heartworm disease. They also report that heartworm is a serious canine and feline health concern that threatens animals in all 48 contiguous states and Hawaii, as well as throughout the temperate regions of the world. April is Heartworm Awareness Month.

Heartworm Prevention Always in Season Says American Heartworm Society

(Appeared on BusinessWire)

The American Heartworm Society reminds pet owners to stay in the heartworm-prevention habit, no matter what the season. Contrary to what owners may think, heartworm disease is a year-round threat.

American Heartworm Society issues revised guidelines

(Appeared at

An increased emphasis on the importance of heartworm prevention, as well as new scientific information about heartworm resistance, testing and treatment, have prompted the American Heartworm Society (AHS) to revise its guidelines for dogs and cats. The updates to the guidelines were announced during the AHS’s half-day symposium at the North American Veterinary Conference earlier this week.

Heartworm Preventive Resistance: Is it Possible?

In certain areas of the United States, most notably the Mississippi Delta region, an inordinate number of dogs have become infected with heartworms while reportedly taking preventive medication. Practitioners diagnosing these unexpected heartworm infections have begun to question the effectiveness of macrocyclic lactones.

Prevent Heartworms in Pets Year-Round

The FDA joins the American Heartworm Society in recommending that all dogs and cats, including indoor pets, be placed on year-round heartworm preventatives.

Read More.

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The days are getting shorter, the nights are cooler, leaves are starting to turn, and football season is here. But that doesn’t mean your clients can forget about protecting their pets from heartworms.

To keep this message front and center with your clients, we’re sharing a set of new posters you can print OR post on your Facebook or Instagram page.

  • To save or print a poster, just click on the image below, then click on the “download” button and save the PDF file.
  • To save a poster for use on your social pages, simply open the downloaded poster, then right click on the file and follow the menu instructions to save the file as a JPEG image.

For more client tools, be sure to visit the Resource Center. And if you don’t already, make sure you’re sharing our Facebook and Instagram posts!