Thelazia callipaeda

The·la·zi·a cal·li·pae·'da

a species reported in humans in Southeast Asia and California; the worm, embedded in a subconjunctival tumor or swimming in the aqueous humor after penetrating the corneoscleral limbus, causes pain, photophobia, and tearing.


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 ?
Thelazia callipaeda (Spirurida, Thelaziidae) is a parasitic helminth transmitted by zoophilic insects of the order Diptera, family Drosophilidae, genus Phortica while feeding on ocular secretions of their hosts during summer (1,2).
Biology of Thelazia callipaeda (Spirurida, Thelaziidae) eyeworms in naturally infected definitive hosts.
The intermediate host of Thelazia callipaeda (Spirurida, Thelaziidae) in Europe and China: nematode biology and larval development inside the vector.
Nematodes that might have caused such an infestation were many (1), including Thelazia callipaeda.
Nematode biology and larval development of Thelazia callipaeda (Spirurida, Thelaziidae) in the drosophilid intermediate host in Europe and China.
Phortica variegata is an intermediate host of Thelazia callipaeda under natural conditions: evidence for pathogen transmission by a male arthropod vector.
Current status and epidemiological observations of Thelazia callipaeda (Spirurida, Thelaziidae) in dogs, cats and foxes in Italy: a "coincidence" or a parasitic disease of the Old Continent?
Emergence of canine ocular thelaziosis caused by Thelazia callipaeda in southern Switzerland.
Local transmission of the eye worm Thelazia callipaeda in southern Germany.
Thelazia callipaeda eyeworm is a nematode transmitted by drosophilid flies to carnivores in Europe.
Among these nematodes, Thelazia callipaeda Railliet and Henry, 1910 (Spirurida, Thelaziidae) has received little attention.
Longitudinal investigation and experimental studies on thelaziasis and the intermediate host of Thelazia callipaeda in Guanghua county of Hubei province.