Also found in: Dictionary, Encyclopedia, Wikipedia.
Related to toxocariasis: toxoplasmosis
infection by worms of the genus Toxocara.
Infection with nematodes of the genus Toxocara; parenterally migrating larvae, chiefly of Toxocara canis, may cause visceral larva migrans; ocular involvement results in either a solitary granuloma in the retina, peripheral inflammatory masses, or chronic endophthalmitis.
toxocariasis/tox·o·car·i·a·sis/ (-kah-ri´ah-sis) infection by worms of the genus Toxocara.
A disease caused by a parasitic nematode of the genus Toxocara, transmitted to humans by ingestion of a substance, such as soil, that has been contaminated by dog or cat feces and typically affecting either the eye or the internal organs. The ocular form of the disease can lead to permanent loss of vision.
Etymology: Gk, toxo, bow, kara, head, osis, condition
infection with the larvae of Toxocara canis, the common roundworm of dogs, and with T. cati, of cats. Human ingestion of viable eggs, commonly found in soil, leads to the spread of tiny larvae throughout the body, resulting in respiratory symptoms, enlarged liver, skin rashes, eosinophilia, and delayed ocular lesions. Children who eat dirt are particularly subject to this disease. Specific drug therapy is not very useful; the outcome is usually good without therapy. Two major forms of the infection exist: ocular larval migrans (OLM), which can cause an eye disease resulting in blindness, occurs when the worm enters the eye. Visceral larval migrans (VLM) is heavy or repeated infection that causes swelling of organs or the central nervous system. Symptoms of this form are caused by movement of the worms and are manifested as fever, asthma, or pneumonia. Severe forms are rare, VLM is treated with antiparasitic drugs and antiinflamatories, OLM is more difficult to treat and usually involves preventing progression of eye damage. Regular worming of pets helps prevent infection. Also called visceral larval migrans.
toxocariasisVisceral larva migrans Parasitology A disease primarily of children due to dog–Toxocara canis and cat–T cati parasites that inhabit the GI tract and release eggs in the feces; when children ingest eggs from contaminated plants, dirt, stool, eggs hatch into larvae in GI tract, burrow through the wall and migrate elsewhere, primarily to liver and lung, but also brain, eye, etc, causing inflammation and tissue damage in transit Clinical Fever, pulmonary complaints–eg, cough, wheezing, seizures, rash, ↓ visual acuity due to migration through ocular structures–periorbital edema, strabismus Prognosis Generally self-limited, Sx eventually disappear; there is no specific therapy
Infection with nematodes of the genus Toxocara; parenterally migrating larvae, chiefly of T. canis, may cause visceral larva migrans; ocular involvement results in a solitary retinal granuloma, peripheral inflammatory masses, or chronic endophthalmitis.
toxocariasisInfection, via the mouth, with the juvenile forms of the common bow-shaped puppy worm Toxocara canis . This is a frequent event in children in contact with puppy fur and contaminated soil. Infection causes a transient illness with fever, lassitude, loss of appetite, pallor and often coughing and wheezing. Rarely, a juvenile worm may lodge in an eye and cause a tumour-like mass on the retina that may damage vision and may be mistaken for the highly malignant RETINOBLASTOMA. Puppies are often infected before birth and should be de-wormed regularly.
Infection with nematodes of the genus Toxocara.
infection by worms of the genus Toxocara. Heavy infestations in young puppies and kittens may be responsible for abdominal distention, signs of colic, diarrhea and poor growth. Somatic tissue migration of larvae in neonatal puppies may cause respiratory and nervous signs.