Dirofilaria immitis

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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

Dirofilaria immitis

Heartworm, a species of filariae that occurs in dogs but may infest humans.
See also: Dirofilaria


a genus of nematode parasites of the superfamily Filarioidea.

Dirofilaria acutiuscula
causes swelling in the subcutaneous fascia of the dorsolumbar area of the peccary.
Dirofilaria conjunctivae
a zoonotic infection on the eyelids of humans, due to infestation of wildlife.
Dirofilaria corynodes
occurs in monkeys.
Dirofilaria immitis
occurs in dog, cat, fox and wolf and has been recorded in humans and many other species. Transmitted by the intermediate hosts, Culex, Aedes, Anopheles and other mosquito genera. Found in the blood vessels, especially the heart and the pulmonary artery. Cause heartworm disease.
Dirofilaria repens
occurs in the subcutaneous tissues of the dog and cat, and occasionally humans.
Dirofilaria roemeri
Dirofilaria striata
found in the bobcat.
Dirofilaria tenuis
found in subcutaneous tissues of raccoons and humans.
Dirofilaria ursi
occurs in black bears.
References in periodicals archive ?
Effects of tetracycline on the filarial worms Brugia pahangi and Dirofilaria immitis and their bacterial endosymbionts Wolbachia.
Antifilarial effect of Zingiber officinale on Dirofilaria immitis.
The two major parasites detected in the peripheral blood smear are Hemobartonella felis (Figure V), causative agent of feline infectious anemia, and Dirofilaria immitis or canine heartworm (Figure VI).
Validation for use with coyotes (Canis latrans) of a commercially available enzyme-linked immunosorbent assay for Dirofilaria immitis.
1] Little SE, Raymond MR, Thomas JE, Gruntmeir J, Hostetler JA, Meinkoth JH, Blagburn BL: Heat treatment prior to testing allows detection of antigen of Dirofilaria immitis in feline serum.
bancrofti (24) and Dirofilaria immitis (25), no report is available on the existence of specific assay for the detection of infective stage larvae of these filarial parasites.
The first three species were among those previously reported to support development of Dirofilaria immitis, the causative agent of heartworm and are therefore considered potential vectors.
titled Subcutaneous infection with Dirofilaria immitis nematode in human, France (1) presents an interesting and challenging diagnostic dilemma.
granulosus, Dirofilaria immitis, Strongyloides spp.
Incidence of Dirofilaria immitis in shelter cats in southeast Texas.
The heartworm pathogen, Dirofilaria immitis, a nematode or roundworm, is spread by infected mosquitoes.