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What causes heartworm in dogs and how do mosquitoes spread it?

Updated On September 23rd, 2025

Hello, I am a student at Ohio State and I am currently enrolled in a veterinary entomology class and have a research project. (a)What is your job position/title? Where is your workplace (city, state, country)? How long have you been in clinical practice for? (b) Please describe a problem/disease you have encountered in a patient or a public/veterinary health situation you experienced that was directly caused by an insect or arachnid?

1 Answer

Most Helpful Answer

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Answered By Ana M, DVM

Veterinarian

Published on April 10th, 2019

Thank you for submitting your question regarding your school project. I am an associate veterinarian in Colorado Springs, CO. I have been in practice for 12 years. I recently saw. a case of heartworm disease. The dog was a 5 year old spayed female mixed breed dog. She was rescued from a group in southern Colorado. Thankfully she was not symptomatic for the disease and responded well to treatment. Heartworm disease is transmitted to dogs by mosquito bites. I hope this information helps!

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