Thelazia

Thelazia

(thē-lā'zē-ă),
The eye worms, a genus of spiruroid nematodes that inhabit the lacrimal ducts and surface of the eyes of various domestic and wild animals, but rarely humans; a number of species have been reported from wild birds. Cyclic development occurs in muscoid flies; infective larvae emerge from the fly mouthparts while the fly is feeding on or near the eyes of the host.
[G. thēlazō, to suck]

Thelazia

/The·la·zia/ (the-la´zhah) a genus of nematode worms parasitic in the eyes of mammals, including, rarely, humans.

Thelazia

(thē-lā′zē-ă) [Gr. thelazo, to suck]
A genus of nematodes that inhabit the conjunctival sac and lacrimal ducts of various species of vertebrates. Occasionally species of Thelazia are found in humans.

Thelazia

a genus of spiruroid worms in the family Thelaziidae. They are all parasites of the lacrimal duct or conjunctival sac of mammals and birds. The larvae are deposited in the conjunctival sac by the intermediate host, Musca spp. flies. Causes thelaziasis.

Thelazia alfortensis
found in cattle.
Thelazia bubalis
found in water buffalo.
Thelazia californiensis
occurs in cat, dog, humans, sheep and deer.
Thelazia callipaeda
occurs in dog, rabbit and humans.
Thelazia erschowi
found in pig.
Thelazia gulosa
found in cattle.
Thelazia lacrymalis
found in horses.
Thelazia leesi
found in dromedary.
Thelazia rhodesii
found in cattle, but also sheep, goat, buffalo.
Thelazia skrjabini
found in cattle.
References in periodicals archive ?
Until now, this type of worm, Thelazia gulosa, had only been found in cattle.
The parasitic worms - known as the Thelazia gulosa species - are less than half an inch long each and until now have spread solely among cattle by flies that feed on eyeball lubrication.
Cases of eye worm parasitic infections are rare in the USA, and this case turned out to be a species of the Thelazia that had never been reported in humans," Bradbury said, adding that previously it was thought there were only two different species of these eye worms that infected humans worldwide, and now Thelazia gulosa is the third.
The woman, Abby Beckley, was diagnosed in August 2016 with Thelazia gulosa.
The parasitic worm, Thelazia callipaeda, is spread by a fruit fly and is capable of infecting dogs, cats and human beings.
A good example is Thelazia callipaeda (Spirurida, Thelaziidae) nematode infections in children and elderly persons living in rural and poor communities in countries in Europe and Asia (2).
Thelazia is an important spirurida nematode of cattle, buffalo, sheep, goat, horse, dog and man.
Parasitic conjunctivitis is rare in North America, but in some cases bot fly larvae or, in the Western United States, the parasitic worm or nematode Thelazia californiensis can inhabit the conjunctival sac between eye and eyelid.
Haemonchus and Trichostrongylus were the most frequently recorded genera followed by Chabertia, Oesophagostomum, Schistosoma, Moniezia, Cooperia, Bunnostomum, Toxocara, Ostertagia, Nematodirus, Trichuris, Strongyliodes, Avitellina, Fasciola, Thelazia (n=02), Syngamus, Gaigeria, Skrjabinema, Cotylophoron, Metastrongylus and Gongylonema as mixed or single species infections in different species of animals.
Thelazia callipaeda Thelaziasis Inflammation of and Thelazia conjunctiva; most californiensis frequent in small children Trichostrongylus spp.
The equine eye worm, Thelazia lacrymalis, is about 19 millimeters long and lives in the tear duct and conjunctival sac of the horse's eye.