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Ophthalmology ; 105(8): 1494-7, 1998 Aug.
Article in English | MEDLINE | ID: mdl-9709764

ABSTRACT

OBJECTIVE: A female patient, resident in the state of Colorado, presented with iritis of the right eye. Slit-lamp examination showed the presence of a thin, threadlike worm entwined in the cornea. The patient was taken to surgery for removal of the parasite. DESIGN: A case report. INTERVENTION: A 3-mm-long supertemporal incision was made in the cornea and further dissected until the worm could be grasped and removed by gentle traction. RESULTS: The worm, a filarial nematode, was identified as a member of the genus Onchocerca, most likely Onchocerca cervicalis, a natural parasite of horses. The patient had an uneventful recovery, and 1 week after surgery, her visual acuity, intraocular pressure, and corneal edema were all resolving. CONCLUSION: In the United States and elsewhere, most cases of zoonotic filarial infection involving the eye are caused by Dirofilaria or Dipetalonema-like worms. However, the current case was caused by a species of Onchocerca. This is the first case of zoonotic Onchocerca from the eye to be reported, only the second case of zoonotic Onchocerca in the United States, and the seventh case worldwide. The worm was removed surgically, and the patient had an uneventful recovery.


Subject(s)
Cornea/parasitology , Corneal Diseases/parasitology , Onchocerca/isolation & purification , Onchocerciasis, Ocular/parasitology , Zoonoses/parasitology , Animals , Colorado , Cornea/pathology , Corneal Diseases/pathology , Corneal Diseases/surgery , Female , Humans , Intraocular Pressure , Middle Aged , Onchocerca/cytology , Onchocerciasis, Ocular/pathology , Onchocerciasis, Ocular/surgery , Visual Acuity
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