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1. A parasitic filarial worm (Dirofilaria immitis) that is transmitted by mosquitoes and infects the pulmonary arteries and often the right side of the heart of dogs and other canids and sometimes other mammals, including cats.
2. The condition resulting from infection with heartworms, characterized by respiratory symptoms and fatigue.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Animals) a parasitic nematode worm, Dirofilaria immitis, that lives in the heart and bloodstream of vertebrates
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014



1. a parasitic nematode, Dirofilaria immitis, transmitted by mosquitoes and invading the heart and pulmonary arteries of dogs and other canids.
2. the disease caused by infection with heartworm.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Pro-Heart 12 - The FDA approved ProHeart 12 (moxidectin) extended-release injectable suspension for dogs 12 months of age and older for the prevention of heartworm disease caused by Dirofilaria immitis for 12 months.
Mosquitoes carry heartworm disease, which can be fatal to both dogs and cats.
[ClickPress, Mon Mar 04 2019] Heartworm disease is generally found in pets including cats and dogs which could be fatal in severe conditions.
Bayer Animal Health, a company that aims to improve the health and well-being of pets and farm animals, has launched its Coraxis (moxidectin) Topical Solution for Dogs, a prescription-only, monthly transdermal product that prevents heartworm disease and treats and controls hookworms, roundworms, and whipworms in dogs, it was reported on Friday.
This drug is used to prevent heartworm disease caused by Dirofilaria immitis, which is spread through the bite of mosquitoes.
Pharmaceutical company Boehringer Ingelheim Monday announced the availability of CENTRAGARD (eprinomectin and praziquantel transdermal solution) to prevent heartworm disease in cats.
Canine Heartworm disease is caused by vector borne filarial worm of the genus Dirofilaria and widely dispersed in most tropical, sub-tropical and temperate regions of the world (Quinn et al., 1998).
Zoetis (https://www.zoetis.com/) has awarded three teams of scientists from University of Georgia, University of Ontario Institute of Technology and University of Wisconsin with a total of $200,000 in research grants, subject to contract, to support projects that will help advance understanding of the fundamentals of heartworm disease and explore potential novel interventions to help prevent it.
Venco, "Heartworm disease in animals and humans," Advances in Parasitology, vol.