Surgical extraction of an intraocular infection of Parelaphostrongylus tenuis in a horse

Journal of the American Veterinary Medical Association
Shelby L ReinsteinPaul E Miller

Abstract

A 4-year-old Hanoverian gelding was evaluated because of a mobile worm-like structure in the right eye. Ophthalmologic examination of the right eye revealed a white, thin, coiled, mobile parasite, which was presumed to be a nematode, located in the ventral portion of the anterior chamber of the eye; there also were vitreal strands located temporally and inferiorly near the margin of the pupil. Results of ophthalmologic examination of the left eye were unremarkable. The horse was treated with a neomycin-polymyxin B-dexamethasone ophthalmic solution applied topically (1 drop, q 8 h) to the right eye and penicillin V potassium (22,000 U/kg [10,000 U/lb], IV, q 6 h). The horse was anesthetized. A stab incision was made in the cornea, and a viscoelastic agent was infused around the parasite. The parasite was extracted via the incision by use of an iris hook and tying forceps. The horse had an uncomplicated recovery from the procedure and retained vision in the right eye. Gross and microscopic examination was used to identify the parasite as an adult metastrongyloid nematode consistent with a fully developed male Parelaphostrongylus tenuis. To the authors' knowledge, this is the first report of intraocular parelaphostrongylosis in a ...Continue Reading

Citations

Nov 22, 2011·The Veterinary Clinics of North America. Equine Practice·Amy L Johnson
May 21, 2016·Veterinary Parasitology·Amie PerryAline Rodrigues-Hoffmann
Mar 21, 2017·Journal of Veterinary Internal Medicine·N S MittelmanA L Johnson
Jan 25, 2013·Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·Toby L PinnGillian A Perkins

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