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In 2016 at Greenville County Animal Care:

  • 801 dogs tested positive for Heartworms.
  • 322 heartworm positive dogs were sponsored for treatment and successfully adopted or rescued.
  • It costs between $200 – $1,100 to treat a heartworm positive dog. That cost does not include bloodwork or x-rays.

You can help increase the number of dogs treated by specifying your donation to help heartworm positive dogs. Your tax deductible donation of any amount helps! Click here to donate.

The Truth About Heartworms

Aren’t heartworms just another kind of worm found in dog stool?

No.  Heartworm disease is a serious and potentially fatal disease in pets. It is caused by foot-long worms (heartworms) that live in the heart, lungs and associated blood vessels of affected pets, causing severe lung disease, heart failure and damage to other organs in the body. Heartworm disease affects dogs, cats and ferrets, but heartworms also live in other mammal species, including wolves, coyotes, foxes, sea lions and—in rare instances—humans. Because wild species such as foxes and coyotes live in proximity to many urban areas, they are considered important carriers of the disease.

How do dogs get heartworms?

The mosquito plays an essential role in the heartworm life cycle. Adult female heartworms living in an infected dog, fox, coyote, or wolf produce microscopic baby worms called microfilaria that circulate in the bloodstream. When a mosquito bites and takes a blood meal from an infected animal, it picks up these baby worms, which develop and mature into “infective stage” larvae over a period of 10 to 14 days. Then, when the infected mosquito bites another dog, cat, or susceptible wild animal, the infective larvae are deposited onto the surface of the animal’s skin and enter the new host through the mosquito’s bite wound. Once inside a new host, it takes approximately 6 months for the larvae to mature into adult heartworms. Once mature, heartworms can live for 5 to 7 years in dogs and up to 2 or 3 years in cats. Because of the longevity of these worms, each mosquito season can lead to an increasing number of worms in an infected pet.

How do I know if my dog has heartworms?

In the early stages of the disease, many dogs show few symptoms or no symptoms at all. The longer the infection persists, the more likely symptoms will develop. Active dogs, dogs heavily infected with heartworms, or those with other health problems often show signs such as: mild persistent cough, reluctance to exercise, fatigue after moderate activity, decreased appetite, and weight loss. As heartworm disease progresses, pets may develop heart failure and the appearance of a swollen belly due to excess fluid in the abdomen.

Can I prevent my dog from getting heartworms?

Yes.  Heartworms is easy to prevent!  You need only give your pet a monthly preventative all year round.  They come as a topical treatment you can put on your pet’s skin or a chewable tablet. Ask your veterinarian for more information or to purchase preventative for your pet.

Is treatment of the disease just as easy as preventing it?

No.  Treatment requires arsenic-based injections to kill the heartworms living in a dog’s lungs and heart. During treatment time, the dog must be kept quiet and prevented from exercise.  In comparison to heartworm prevention, the treatment is expensive and can be traumatic and risky. It is much easier to prevent heartworms than to treat them.

Want to learn more about heartworms?  Click here.