The Risks of Heartworms to Dogs and Cats

medically reviewed by Dr. Jessica Taylor
August 7, 2023

Heartworm disease is a significant concern for pet owners, posing a serious threat to the health and well-being of our beloved dogs and cats. At Petfolk our focus on preventative care helps us identify potential risks for heartworm disease early, allowing for proper and effective treatment.
What is Heartworm Disease?
Heartworm disease is caused by Dirofilaria immitis, a parasitic worm transmitted through the bite of infected mosquitoes. The adult worms reside in the heart and lungs of infected animals, leading to severe damage to these vital organs over time. While dogs and cats can both get heartworms, the disease manifests differently in each species.
The Dangers to Dogs
For our canine friends, heartworm disease can have devastating consequences. As the worms multiply and grow, they obstruct blood flow, leading to heart and lung damage. Early symptoms may go unnoticed, but as the disease progresses, dogs may exhibit signs such as coughing, lethargy, weight loss, and difficulty breathing. In advanced cases, heartworms in dogs may cause fainting, heart failure, and even death.
The Threat to Cats
Cats, although less prone to heartworm infection than dogs, can still suffer severe consequences when infected. Heartworms in cats often go undiagnosed as they are not natural hosts for the worms, making detection challenging. Symptoms in cats may include coughing, vomiting, and difficulty breathing. In some cases, sudden collapse or sudden death may be the first indicators of the disease.
Prevention is the Key
As with many health issues, prevention is always better than the cure. Protecting your pets from heartworm disease should be a top priority. Several preventive measures are available for both dogs and cats, including monthly oral medications, topical treatments, and injectables. Consult your veterinarian to determine the most suitable prevention plan for your pet based on their health status, lifestyle, and risk factors.
Routine Heartworm Testing
Regular heartworm testing is essential, even for dogs on preventive medication. The most common test for dogs detects the presence of female adult heartworms. Your vet may also use a drop of blood to check for immature larvae, indicating heartworms that are reproducing. Early detection allows for prompt intervention, minimizing potential damage and increasing the chances of successful treatment.
Treatment Options
If heartworm disease is diagnosed in your pet, timely treatment is crucial. The process involves several steps, including pretreatment testing and a series of injections to eliminate the adult worms. Rest and limited physical activity is essential during the treatment period. However, treatment can be more complicated for cats, and there is no specific medication approved for their treatment. Hence, prevention remains the best approach for feline heartworm disease.
The Role of Pet Owners
As responsible pet owners, we play a vital role in safeguarding our pets' health. By following preventive measures recommended by veterinarians and adhering to regular check-ups with your Primary Care Veterinarian, we can significantly reduce the risk of heartworm disease in our pets. Additionally, minimizing your pets' exposure to mosquitoes can also help mitigate the chances of infection.
Heartworm disease is a serious and potentially fatal condition that poses a significant risk to dogs and cats. Recognizing the importance of prevention, regular testing, and timely treatment is crucial in ensuring the well-being of our beloved pets.