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Thelazia Callipaeda and Eye Infections

Eye infections can be caused by metazoans - helminths and for long this parasitosis was believed to spread only in tropical regions of the world. Lately, mostly subconjunctival infections of adults or immature forms of D. repens, which is nematoda- filaria of canids, have been described and the man...

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Bibliographic Details
Published in:Acta Facultatis Medicae Naissensis 2014-09, Vol.31 (3), p.171-176
Main Authors: Otasevic, Suzana, Bozinovic, Marija Trenkic, Tasic, Aleksandar, Petrovic, Aleksandar, Petrovic, Vladimir
Format: Article
Language:English
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Summary:Eye infections can be caused by metazoans - helminths and for long this parasitosis was believed to spread only in tropical regions of the world. Lately, mostly subconjunctival infections of adults or immature forms of D. repens, which is nematoda- filaria of canids, have been described and the man is just an accidental host. The genus Thelazia (Spirurida, Thelaziidae) comprises a cosmopolitan group of eye worm spirurids responsible for eye infections of domestic and wild animals and humans, carried by different kinds of flies. Nematodes localized in the conjunctival space, lacrimal canals and surrounding ocular tissues of humans can cause symptoms from mild to very serious and severe ones if not treated. The chief aim of this paper was to describe the morphological characteristics, life cycle, prevalence and clinical significance of Thelazia spp. as a parasite of the eye. To ensure the diagnosis of thelasiosis and appropriate treatment, it is necessary to have continuing medical reports and increase the awareness of this infection. Infekcije oka mogu da izazovu metazoe-helminti. Dugo se za ove parazitoze verovalo da su rasprostranjene samo u tropskim krajevima sveta. U poslednje vreme najčešće su opisane subkonjuktivalne infekcije adultima ili nezrelim formama vrste D. repens, koje su filarije kanida i za koje je čovek samo slučajni nosilac. S obzirom na činjenicu da se na teritoriji grada Niša dijagnostikuje telazioza (thelasiosis) kod pasa, opis morfoloških karakteristika roda, životnog ciklusa, rasprostranjenosti i kliničkog značaja ovog uzročnika zoonoza prvenstveno je bio cilj ovog rada. Rod Thelazia (Spirurida, Thelaziidae) obuhvata kosmopolitsku grupu očnih crva spirurids, odgovornih za očne infekcije domac ih i divljih životinja i ljudi koje se prenose različitim vrstama mušica. Morfološki odrasli crvi su kremasto bele boje, končastog izgleda, dužine do 2 cm. Dokazano je da su muve reda Diptera, porodice Drosophilidae, roda Phortica, vektori i prelazni domaćini vrste T. callipaeda. Nematode lokalizovane u konjunktivalnom prostoru, suznim putevima i okolnim okularnim tkivima kanida, felida, glodara i ljudi, mogu izazvati blage simptome (pojačano suzenje, svrab, osećaj stranog tela, bol, otok, zamagljen vid, eksudativni konjunktivitis) do onih jako ozbiljnih i teških (zamućenje i ožiljavanje konjunktive i rožnjače, ulceracije rožnjače i keratitis) ukoliko se ne leče. Kako bi se obezbedila sigurna dijagnoza telazioze i sprovođenje odgovarajućeg tretm
ISSN:2217-2521
0351-6083
2217-2521
DOI:10.2478/afmnai-2014-0021