JUST ONE BITE
FROM AN INFECTED MOSQUITO
IS ALL THAT IT TAKES1

Infected mosquitos transmit heartworms that grow and reproduce in your dog's heart and blood vessels of the lungs. Heartworms grow to be up to a foot long, and can cause severe lung disease, heart failure, organ damage and even death.
Treatment can also be dangerous.
Here's what you can expect:
Dog can exhibit sickness with coughing, distended abdomen, listlessness, weight loss and difficulty breathing.
To confirm the presence of heartworms.
A thorough medical exam is required, including radiographs and possibly ultrasound to determine the extent of the disease.
In separate appointments, a series of injections of a potent arsenic-based medication is administered to kill the heartworms.
A stay up to 3 days may be recommended during the heartworm treatment. The dog must be kept inactive and closely monitored.
To keep the dead heartworms from going to the lungs and causing a life-threatening situation, the dog must not exercise and be kept confined for up to 2 months.
Months later, tests are required to confirm the success of the treatment. Not all dogs will survive this grueling treatment regimen.
Climate changes, family relocation and vacation travel have allowed heartworm-carrying mosquitos to expand their range3. Tri-Heart® Plus is easy to administer year-round to make sure your dog is always protected.
Heartworm growth in the U.S. from 2001 through 20134.
(Move slider to compare)
Heartworm Cases in 20014
Heartworm Cases in 20134
Average number of cases per reporting clinic
< 1 Case per clinic
1-5 Cases per clinic
6-25 Cases per clinic
26-50 Case per clinic
51-99 Cases per clinic
100+ Cases per clinic
No matter what the season, products like Tri-Heart® Plus should be administered year-round without missed or late doses for effective heartworm protection.
1 Adopted from Think 12 Infographics at the American Heartworm Society webpage. For detailed information, please visit https://heartwormsociety.org/veterinary-resources/client-education/think-12#think-12-infographics (accessed May 18, 2017).
2 Tri-Heart® Plus pricing for 40-lb dog using American Heartworm Society average heartworm treatment cost of $1200–$1800. https://www.heartwormsociety.org (accessed May 18, 2017).
3 American Heartworm Society. https://www.heartwormsociety.org (accessed May 18, 2017).
4 Incidence maps used with permission from the American Heartworm Society, https://www.heartwormsociety.org/pet-owner-resources/incidence-maps. (accessed May 18, 2017)
All dogs should be tested for heartworm infection before starting a preventive program. In a small percentage of ivermectin/pyrantel treated dogs, digestive and neurological side effects may occur.
HEARTGARD is a registered trademark of Merial.