Symptoms Of Heartworms In Dogs

Heartworms in dogs introduction

The heartworm is a small parasitic roundworm that looks like a string of translucent thread. Despite its reference to the heart, the worm usually settles in the lung arteries, leading to fatal lung tissue and vessel damage, extensive damage may also lead to organ damage.

Dogs are what is known as the "definitive" host, meaning they are the vessel through which these worms reach adulthood. But canines, while the most common host, are not alone in their plight with the parasite. Other pets such as cats and ferrets (and occasionally even humans) are sometimes forced to contend with heartworms.

Transmission is usually difficult to predict and control because the larvae are deposited under the skin by infected mosquitoes. The larvae then travel through the veins to their chosen nestling ground where, around four months later, the reach maturity and begin their potentially fatal course.

Warning

Buying medicine online for a case of canine heartworms is not recommended. However, if you do, please read the pet owner instructions in the link provided above.

Symptoms of heartworms

Initially there are no symptoms of heartworms in dogs, making it difficult to spot the illness early. As the disease reaches an advanced stage however, complications begin to arise and may begin to multiply as time goes by.

  • Coughing
  • Lethargy
  • Labored breathing
  • Fainting spells
  • Rasping sounds coming from the lungs
  • Congestive heart failure
  • Fluid retention (chest area)
  • Tachycardia (rapid pulse)
  • An enlarged liver
  • Dry coat
  • Rapid weight loss
  • Vomiting and diarrhea
  • Death

A vet can diagnose heartworms by using one of several different methods including the modified Knott test or an antigen test. Dogs should be routinely screened for heartworms, especially between the ages of four and eight.

Heartworm treatment in dogs

Heartworm prevention is relatively cheap, however, treatment presents some risks and is very expensive.

Prevention

Preventing heartworms is a relatively simple process, but your veterinarian may recommend different solutions based on where you live and how much time your dog spends outdoors. Bear in mind that heartworms have been diagnosed in all 50 states. There are three main types of prescription prevention solutions:

  • A topical liquid 
  • Via injection 
  • Via tablet or pill 
Heartworm treatments can also be combined with other useful treatments such as flea prevention. 

Treatment

Different stages of the disease require different treatments, potentially leading to anything from a series of injections to surgery (in critical cases).

Immiticide injections are commonly used to treat heartworms in dogs, but because of its chemical toxicity (it is an arsenic compound) it presents some risks.

Once the injections and treatment has been administered, the death of the heartworms can clog up arteries, thus requiring the pet owner to make sure that the dog limit exercise for six weeks after treatment. Exercise can lead to death!

Also, remember that heartworms in a non-infectious disease, and your other pets (and yourself) do not run the risk of being infected.

Thank you!

Thank you for taking the time to read this article, for any questions or concerns, feel free to use the comments module below this text.

Sincerely, 

Thoog. 

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Comments 21 comments

MKayo profile image

MKayo 6 years ago from Texas

Very informative, but I just had to look away from the dog heart in a jar. I wish more folks would take better care of their animals.


ZarkoZivkovic profile image

ZarkoZivkovic 6 years ago from Serbia

We had a problem with roundworms with our dog, luckily for us and the dog it's much easier to get rid of roundworms than heartworms! Nice info.


MPG Narratives profile image

MPG Narratives 6 years ago from Sydney, Australia

We give our dog heartworm tablets every month along with her flea treatment. She is now 4 and as you mentioned they may be a risk between 4-8 years I will keep a more close eye on her for the symptoms you wrote. Thanks for the info, very useful.


thooghun profile image

thooghun 6 years ago from Rome, Italy Author

Thanks for you comments everyone!


marisuewrites profile image

marisuewrites 6 years ago from USA

Great information for us pet lovers!


interceptor for dogs 6 years ago

thank you very much for the article. it may save the life of many pupies.


Faeriephenomenon profile image

Faeriephenomenon 6 years ago from USA

This is a great article with very useful info. Thanks for the advice and treatments. :)


thooghun profile image

thooghun 6 years ago from Rome, Italy Author

Thanks again Marisue and Faerie!


Lisa 6 years ago

Get the yearly heartworm injection and save yourself the hassle and worry. It's perfectly safe.


RhondaCzech profile image

RhondaCzech 6 years ago from Ontario, Canada

Good to know! I live in an area where we get lots of mosquitoes. I have a 19 month old pitbull/boxer mix and just recently adopted her, I don't know her history, I will take her in now to have her checked.

Thankyou for your informative hub.


GetSmart profile image

GetSmart 5 years ago

This is such good information to know. Thank you.


sonia05 profile image

sonia05 5 years ago from india

very useful and informative hub!!


Diana Lee profile image

Diana Lee 5 years ago from Potter County, Pa.

A good thing to know, thanks.


L A Dreamin profile image

L A Dreamin 5 years ago from Pennsylvania

Great information, had to vote useful :) thanks!


william.fischer29 profile image

william.fischer29 5 years ago

Great information and useful. Thanks.


OnTheRock profile image

OnTheRock 5 years ago from Tortola, British Virgin Islands

My dog has a very dry coat- hope it isn't heartworm! He does get Revolution each month.


Flo 5 years ago

my yorkie pup is about 10 months old....she has had a dry cough since she was just few months old and I took her to the vet who insisted she has allergies but her coughing seems to be more intense when she is active and she has gotten to where she is vomiting often. She is active and hyper and still has an appetitie but I am scared she may have a more serious problem such as heartworms or some other disease than allergies. If either of these is a possibility what else do I need to look for to be more secure in my worries or am I just being an over protective mother?


Michelle 5 years ago

I adopted my dog and the papers we got for her says that she was treated for heart worms, but she is showing signs that she has them. Took her to the vet and the vet says she is ok. The vet told me that she has allergies. I feel like I should get a second option. It is hard to see a family member sick and can't do anything about it.


norma 4 years ago

wonderful information. thank you.


April 4 years ago

Heartworms are very scary but good information for us to know and know this awful symptoms.


concerned 4 years ago

How expensive is heartworm treatment?

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