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A guide to heartworm testing

Check out some key pointers to keep your heartworm screening protocol current based on the most recent recommendations from the American Heartworm Society (AHS).

By Jenni Rizzo, DVM

Heartworm screening is a familiar component of pet check-ups, but did you know that the most recent American Heartworm Society (AHS) heartworm testing guidance goes beyond antigen testing in dogs?

The AHS Canine and Feline Heartworm Guidelines, updated in 2024, recommend microfilaria testing for dogs annually alongside antigen testing, provide instructions for interpreting discordant test results, and now urge routine heartworm screening for cats as well as dogs.

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When warm weather hits, you will want to ramp up your heartworm education efforts. To help make this goal easy--and fun--the AHS has created a new set of posters to print or post on your social pages.

  • 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!

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