Can Dogs Be Treated For Heartworms?


There are several unpleasant parasites that can cause serious health

problems for our canine companions, but heartworm would have to be one of

the nastiest. These stomach-churning worms live in your dog’s heart, lungs, and

arteries and can potentially have life-threatening consequences for our furry


But don’t

despair — dogs can be treated for heartworms and in many cases will enjoy a

full recovery. Even better, protecting your dog against heartworm is a whole

lot easier than you might think.

So, how do

heartworms affect your dog, how can these worms be treated, and what does

heartworm prevention involve? Let’s take a closer look.

Signs of Heartworms in Dogs

The most worrying thing about heartworms for many owners is that, in the

early stages of heartworm disease, many dogs show no ill effects at all.

However, the longer an infection persists and the more serious it becomes, the

more signs and symptoms will become apparent.

So, what signs should you keep an eye out for? A mild, persistent cough is often the first symptom many owners pick up on, while lethargy, fatigue, and a general reluctance to or intolerance for exercise can also ring alarm bells. A decreased appetite and weight loss may also occur, while advanced cases can also present with a swollen belly due to excess fluid in the abdomen.

In more serious cases, dogs infected with large numbers of heartworms can

suffer from anemia and sudden, life-threatening blockages of blood flow within the heart,

leading to cardiovascular collapse.

Body Language

You may also notice signs of a heartworm infestation in your dog’s body language, such as:




Ears Drop

Other Signs

Make sure you keep your eyes and ears peeled for the following heartworm warning signs:

Persistent Cough



Reduced Appetite

Weight Loss

Lack Of Muscle Tone

Scruffy Coat

Swollen Belly

The History of Dog Heartworms

Heartworms were first discovered in Italy back in 1626, but the first reported case in the United States didn’t occur until 1847. These nasty, foot-long worms are still as dangerous to dogs now as they were 170-odd years ago, but the diagnosis, treatment, and prevention of heartworm infestations have come a long way in the ensuing period.

Much of this can be put down to the formation of the American Heartworm Society in 1974. Not only do we now have a much deeper understanding of how heartworms spread and the health consequences they have for our pets, but we also have much more successful treatment methods and preventative products that are more or less 100 percent effective at protecting dogs against heartworms.

Although heartworms were originally thought to be limited to warm, humid coastal areas with high mosquito numbers, they’ve since spread into much larger areas. Surveys conducted over the past few areas have shown the spread of Dirofilaria Immitis from the sub-tropical southern and southeastern states to the colder climates of northern states, including inland areas. In fact, while some areas in the northwest of the country are still relatively free of heartworm, the disease has been diagnosed in all 50 states.

The Science of Heartworms

Heartworms are transmitted by infected mosquitoes carrying heartworm larvae. When your dog is bitten, these larvae make their way to the heart and blood vessels of the lungs, and they mature and grow inside your dog’s body.

Adult worms can grow up to 12 inches long and then reproduce immature heartworms, known as microfilariae, into your dog’s blood.

Every three years, the American Heartworm Society conducts its Heartworm Incidence Survey. The 2016 survey revealed that:

* The average number of dogs diagnosed per clinic in 2016 rose by 21.7 percent compared to 2013.

* 23.3 percent of veterinarians surveyed reported seeing more heartworm cases in 2016 vs. 2013, while 19.8 percent reported a decline in their practice areas.

* No US state is completely free of heartworm disease.

* The top 10 states with the highest rates of heartworm incidence were Mississippi, Louisiana, Arkansas, Texas, Tennessee, South Carolina, Georgia, North Carolina, Alabama and Florida.

* Of those top 10 cities, only Alabama, Louisiana and Texas saw decreases in the number of dogs diagnosed.

Heartworm Diagnosis and Treatment

The earlier that heartworm disease is detected, the better your pet’s chances are of recovering from the condition. The longer it’s left undiagnosed and untreated, the greater the potential for damage to your dog’s heart and lungs.

Your veterinarian can administer a simple heartworm test by taking a small blood sample from your pet, and the American Heartworm Society recommends that you get your dog tested every 12 months. And while no dog lover wants to hear that their pet has tested positive for heartworm, the good news is that the disease can be treated.

The first stage of treatment will usually involve your dog being hospitalized so that an adulticide can be administered to kill the adult heartworms. Monthly medication can also be given at home to eliminate the microfilariae in the bloodstream, and you may need to restrict your dog’s activity levels for at least four to six weeks.

In the most serious cases, where dogs suffer a life-threatening form of cardiovascular collapse known as Caval Syndrome, immediate surgical removal of the heartworm blockage may be required.

In the fight against heartworm, early detection and treatment are key to saving your dog’s life.

Tips & Things to Know

1️⃣ Recognizing the symptoms of heartworm disease in dogs is crucial for early detection and treatment. Some signs to watch out for include a persistent cough, fatigue, lethargy, reduced appetite, weight loss, and a swollen belly. Advanced cases may also show signs of anemia and cardiovascular collapse.

2️⃣ Regular heartworm tests are essential in preventing severe damage to your dog’s heart and lungs. The American Heartworm Society recommends that dogs be tested every 12 months. Early detection improves the chances of full recovery.

3️⃣ While heartworm disease is treatable, prevention is easier and more beneficial for the dog’s health. Various heartworm preventative products are available that are highly effective. It’s also important to know that heartworms are not limited to warm, humid areas with high mosquito numbers – they have been diagnosed in all 50 states in the U.S.

Frequently Asked Questions, Answered ✅

1. How do heartworms affect dogs?
– Heartworms live in the heart, lungs, and arteries of dogs, potentially causing life-threatening consequences.

2. What are the signs of heartworms in dogs?
– Signs of heartworms in dogs include a persistent cough, lethargy, fatigue, decreased appetite, weight loss, and a swollen belly.

3. What are the body language signs of a heartworm infestation in dogs?
– Body language signs of a heartworm infestation in dogs may include whining, shaking, panting, and dropped ears.

4. What is the history of dog heartworms?
– Heartworms were first discovered in Italy in 1626 and have since spread to all 50 states in the US. The formation of the American Heartworm Society in 1974 has led to better understanding, treatment, and prevention methods.

5. How are heartworms diagnosed and treated in dogs?
– Heartworms can be diagnosed through a simple blood test administered by a veterinarian. Treatment involves hospitalization for adulticide administration and at-home medication to eliminate microfilariae. In severe cases, surgical removal of blockages may be necessary.

Max Kozinskiy
Max Kozinskiy
Max Kozinskiy is a seasoned writer and an enthusiast of dog breed expertise. Having dedicated over 5 years to studying the intricacies of different dog breeds and their unique characteristics. His profound insights and love for our four-legged friends have made him an invaluable part of our team.

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