Toxocariasis

a helminthiasis occurring primarily in the young of dogs, foxes, arctic foxes, cats, and other carnivores. It is caused by large nematodes (roundworms) of the genus Toxocara, up to 10–18 cm in length, which infest the small intestine. Dogs are infested by T. canis, and cats by T. mystax. The parasites’ eggs are excreted in the feces, and the hatched larvae infest both the carnivorous hosts and such intermediate hosts as mammals (including man), birds, and earthworms.

Entering the intestine of the host together with food or water, the larvae hatch and proceed to the lungs by way of the blood vessels. From there they are carried by the blood into the muscles and other organs, including the placenta. The larvae develop into sexually mature Toxocara in the intestine; the complete developmental cycle lasts 26–28 days.

Puppies and kittens are generally infested prenatally; the infested animals develop gastritis. Toxocariasis is treated with an-thelminthics. Infestation is prevented by keeping the animals’ quarters scrupulously clean and by treating infested animals.

V. G. GAGARIN

toxocariasis

[tok″so-ka-ri´ah-sis] infection by worms of the genus Toxocara.

tox·o·ca·ri·a·sis

(tok'sō-kă-rī'ă-sis), 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

(tŏk′sō-kə-rī′ə-sĭs)n. 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.

toxocariasis

Visceral 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

tox·o·ca·ri·a·sis

(tok'sō-kă-rī'ă-sis) 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.

toxocariasis

Infection, 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.

tox·o·ca·ri·a·sis

(tok'sō-kă-rī'ă-sis) Infection with nematodes of the genus Toxocara.

单词	toxocariasis
释义	toxocariasis tox·o·ca·ri·a·sis T0296850 (tŏk′sō-kə-rī′ə-sĭs)n. 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. toxocariasis (ˌtɒksəkəˈraɪəsɪs) n (Medicine) the infection of humans with the larvae of a genus of roundworms, Toxocara, of dogs and cats. It can cause swelling of the liver and, sometimes, damage to the eyes toxocariasis The infestation of humans by the worm toxocara canis, which lives in the intestines of dogs. It can infect and destroy the retina. Translations Toxocariasis Toxocariasis a helminthiasis occurring primarily in the young of dogs, foxes, arctic foxes, cats, and other carnivores. It is caused by large nematodes (roundworms) of the genus Toxocara, up to 10–18 cm in length, which infest the small intestine. Dogs are infested by T. canis, and cats by T. mystax. The parasites’ eggs are excreted in the feces, and the hatched larvae infest both the carnivorous hosts and such intermediate hosts as mammals (including man), birds, and earthworms. Entering the intestine of the host together with food or water, the larvae hatch and proceed to the lungs by way of the blood vessels. From there they are carried by the blood into the muscles and other organs, including the placenta. The larvae develop into sexually mature Toxocara in the intestine; the complete developmental cycle lasts 26–28 days. Puppies and kittens are generally infested prenatally; the infested animals develop gastritis. Toxocariasis is treated with an-thelminthics. Infestation is prevented by keeping the animals’ quarters scrupulously clean and by treating infested animals. V. G. GAGARIN toxocariasis toxocariasis [tok″so-ka-ri´ah-sis] infection by worms of the genus Toxocara. tox·o·ca·ri·a·sis (tok'sō-kă-rī'ă-sis), 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 (tŏk′sō-kə-rī′ə-sĭs)n. 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. toxocariasis Visceral 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 tox·o·ca·ri·a·sis (tok'sō-kă-rī'ă-sis) 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. toxocariasis Infection, 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. tox·o·ca·ri·a·sis (tok'sō-kă-rī'ă-sis) Infection with nematodes of the genus Toxocara.
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