heartworm

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Di·ro·fi·la·ri·a im·'mi·tis

a species of filarial worms; primary hosts are dogs and other canids in tropical, subtropical and temperate climates, adult worms are found chiefly in the right ventricle and pulmonary arteries of dogs; sometimes a serious pathogen of racing and show dogs, especially in the southern U.S. where mosquito vectors are most common; Dirofilaria immitis and its canine host have been used to test chemotherapeutic agents, and an extract of Dirofilaria immitis may be used as a nonspecific intradermal antigen in the diagnosis of human filariasis and in complement-fixation tests.
See also: Dipetalonema reconditum.
Synonym(s): heartworm

heartworm

/heart·worm/ (hahrt´wurm) an individual of the species Dirofilaria immitis.

heartworm

(härt′wûrm′)
n.
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.

heartworm

the common name for dirofilariaimmitis.
Enlarge picture
Heartworms. By permission from Darke P, Kelly DF, Bonagura JD, Color Atlas of Veterinary Cardiology, Mosby, 1995

heartworm dermatitis
cutaneous dirofilariasis; a variety of skin lesions have been seen in dogs infested by Dirofilaria immitis, including hypersensitivity reactions, pyogranulomas and seborrheic dermatitis.
heartworm disease
the syndrome of pulmonary artery disease with hypertension, heart failure (primarily cor pulmonale), and occasionally liver failure and interstitial, tubular and glomerular renal lesions caused by infestation by Dirofilaria immitis. Many species may be infected, but dogs are most commonly affected by chronic cough, weight loss and ultimately congestive heart failure. Infestation by the parasite, and the disease, can be prevented with appropriate prophylactic chemotherapy. Called also dirofilariasis. See also occult heartworm infection, caval syndrome.
References in periodicals archive ?
Heartworm disease is caused by a thread-like parasitic worm that lives in the heart, lungs and associated blood vessels of an infected animal.
It is also active against ear mites, lice, gastrointestinal nematodes and prevents heartworm disease through its efficacy against Dirofilaria immitis larvae.
The medical literature continues to refer to canine and human heartworm disease as cardiac infections, and to human pulmonary lesions as ischemic infarcts.
I spent the few months nursing Rupert through treatment for heartworm disease.
Eosinophilic pneumonitis is most often reported in true occult heartworm disease, when immune-mediated destruction of microfilariae in the pulmonary microcirculation produces amicrofilariaemia, which incites an inflammatory reaction/eosinophilic pneumonitis (Calvert et al.
MESSAGE: To raise consumer awareness of the dangers of feline heartworm disease, while focusing on the importance of prevention and protection.
Before becoming a donor, dogs must have a full blood panel taken, get blood-typed, tested for heartworm disease and be examined by a veterinary internal medicine specialist, Schluckebier said.
Vet Steven Weinstein said Rocco was also suffering from heartworm disease but he had prescribed antibiotics to deal with the parasites.
Heartworm disease is a deadly parasitic infection of canines caused by the nematode Dirofilaria immitis.
ProHeart 6 was the first, and only, product approved by the FDA to be administered once every six months to treat heartworm disease in dogs.
It is the active ingredient in Heartguard, approved for all species of dogs, including Collies, to prevent heartworm disease, and is given at a dose of 6 ug/kg.
Necropsies of dead foxes have found heartworm disease spreading through the population, another legacy of humans' habitation with their domestic dogs.