Nothing Heartwarming about Heartworm

Image of an old dog sleeping outside.

Heartworm is a long, string-like parasitic worm that has the scientific name Dirofilaria immitis. It earns its common name by living in the host’s heart, lungs, and blood vessels. Heartworm can cause severe lung disease, heart failure, organ damage, and death. It is transmitted only through mosquitoes to a variety of species including dogs, cats, ferrets, wolves, foxes, ferrets, sea lions, and in rare instances, humans. Heartworm can affect any breed of dog or cat.

Heartworm infects animals all over the world. Once inside an animal, a heartworm can live five to seven years, and grow up to twelve inches long. Adult heartworms look like strands of cooked spaghetti.

Mosquitoes spread heartworm to the host animal. When a mosquito bites the animal, it transmits infected larvae through the bite wound. Once inside an animal, it takes six or seven months for the larvae to mature into adult heartworms. These adult heartworms mate and the females release the offspring, called microfilariae, into the host animal’s bloodstream. Mosquitoes then ingest these microfilariae when they bite the infected animal, completing the lifecycle of heartworm.

The parasite lives inside a mosquito, and develops into infective larvae in 10 to 14 days. Microfilariae cannot become infective larvae without first passing through a mosquito. This means heartworm is spread only through mosquito bites and not by casual contact.

The presence of the parasites inside the heart and lungs causes a large degree of inflammation, and can severely interfere with blood flow. This can cause coughing, asthma -like signs, heart failure, weight loss, fluid build-up in the abdomen, or sudden death. If your pet develops heartworm, your veterinarian will do tests including chest x-rays and blood tests to determine how seriously it is affected. Treatment includes doxycycline and an injectable drug named Immiticde ? which is derived from arsenic. The treatment takes several months, and can also cause side effects.

For all these reasons, it is much better to just prevent heartworm in the first place.

Sources:

American Heartworm Society

Call to schedule your pet's wellness or urgent care exam now: (952) 758-6722

Testimonials

  • We have been clients of New Prague Animal Care for over 13 years. They have provided exceptional and compassionate care for our “pack” (6 dogs and 3 cats). As a professional dog trainer, breeder of Best in Show and Master Hunter Retrievers as well an owner of multiple kennel/ doggy daycare facilities (30+ years), I have worked with numerous veterinary clinics both in the Twin Cities and nationwide. Dr. Steve and his crew rate among the finest I have worked with. The clinic has all of the fea

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  • My dad has taken all of his dogs there for years, and I take mine there as well. Dr. Lavalle's bedside manner is amazing, and his staff are so genuine and caring. I always have, and will continue referring people to take their pets here. They are hands down the best veterinary care in the area!

    - Amber C
  • Have taken our dogs to Dr. Lavallee for over 10 years and he is great with each of them. He and his staff are very caring and helpful.

    - Barb S
  • Middle of a snow storm a few days ago. My little puppy was injured. I live in Faribult. Vet offices were closed in town. They actually called me while in route to see if I was ok. They were so good with the puppy. The cost was very reasonable. Called today to see how everything was going. I really was very impressed with this office. I recommend this place.

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    Show More - Wendy E
  • Awesome experience! My pets love the care they get from Dr. Lavallee and his staff! They are not just a number; they care for them like my babies are family! Would highly recommend them!

    - SGGM
  • Found a 6-wk old kitten on the side of the highway and brought it in at 7pm on emergency basis. I was blown away by the compassion of Dr. Johnson's team. What a great experience. True animal people!

    - Anna H
  • Moved to New Prague and found this place for our dog.. Such great service, friendly staff, amazing Dr. and very accommodating to all of our needs!! Highly recommended by my pet family!!!

    - Kerri N
  • We love New Prague Animal Care, they are always so kind and caring, from the phone calls to when you walk in. We take our Siberian Husky Bandit in and he gets so much attention, well loved. We've had to take him in twice for emergencies, the in house testing was great, Dr. Johnson was able to resolve the issue almost immediately. I wouldn't take him anywhere else.

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    Show More - Myra C

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