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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 ?
There is some significant variation in the sensitivity and specificity of the current tests for the adult heartworm antigen.
Specific treatment of heartworms in cats usually is not attempted, as the drugs used to kill adult heartworms can be toxic to cats, worm burdens are generally low in cats (unlike in dogs), and the worms usually die off within one to two years (in dogs they live for a longer time).
TheBritish Veterinary Associationhas warned of "Trojan dogs" - strays from some European countries and other parts of the world that may have unknown health histories and undetected diseases that are not traditionally seen in the UK, such as leishmaniasis, rabies, canine babesiosis and heartworm.
"When Ms Blanden contacted us to adopt the dog, she was made aware that Branna had tested positive for heartworm and was undergoing treatment," said spokeswoman Catherine Reid.
[ClickPress, Mon Mar 04 2019] Heartworm disease is generally found in pets including cats and dogs which could be fatal in severe conditions.
The adoption fee includes spay/neuter, up-to-date shots, microchipping and heartworm treatment for dogs.
Pharmaceutical company Boehringer Ingelheim Monday announced the availability of CENTRAGARD (eprinomectin and praziquantel transdermal solution) to prevent heartworm disease in cats.
"After recovering from the heartworm he was taken to the Refugio dos Burros refuge, and learnt to cope well with only three legs."
Heartworm disease is considered as one of the most fatal causes behind respiratory distress in canine where mosquitoes play a major role in transmission.
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.
CCA includes point of care laboratory testing instruments and supplies under a unique multi-year Reset Subscription model, digital imaging products, software and services, local and cloud-based data services, allergy testing and immunotherapy, and single use offerings such as in-clinic diagnostic tests and heartworm preventive products.