Ocular manifestations of systemic disease: ocular parasitosis

Rathinam, Sivakumar R.; Kawali, Ankush

doi:10.1097/icu.0b013e32833ef67e

Cited by 13 publications

(2 citation statements)

References 70 publications

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“…It can cause eye damage by disrupting normal structure mechanically, secreting toxic metabolites and inducing immune or allergic reactions [ 2 , 3 ]. Ocular parasites—involving three species: worms, protozoa, and arthropods—are an alive organism living in the host eye that acquire some of its nutritional requirements through intimate contact with the host [ 4 ]. Common routes of worm infection include ingesting unclean water, soil, undercooked food and contacting animals that carrying worm eggs [ 1 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Case report: an unusual unilateral pterygium — a secondary pterygium caused by parasitosis in the scleral fistula

et al. 2021

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Background Ocular parasitosis can cause eye damage, which contribute to eye symptoms such as burning, itching and even blindness. It is uncommon to see the parasitosis lying in the sclera layer, neither it causing pterygium. Here, we present an unusual case of a secondary pterygium caused by intrascleral worm. Case presentation A 52-year-old women complained about discomfort in right eye for 6 years. Slit-lamp examination indicated a thickened triangular layers of conjunctiva extending from the nasal edge to the cornea. The diagnosis was pterygium in the right eye. To our surprise, after scleral of nasal side exposed, we could see a tiny fistula right in the sclera which lied right under the pterygium, with an alive and motile worm inside. An intrascleral fistula was noted. Then the worm was removed by forceps from the fistula, which was creamy white, thread-like and 1 cm long. Discussion and conclusions As far as we known, it is the first case of an intrascleral worm hidden beneath the conjunctiva which caused the secondary pterygium. It is hard to know the etiology of the secondary pterygium which caused by parasitosis in the scleral fistula untill excision surgery. It is hard to imagine the worm was living in the sclera of the patient for a long-time.

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Section: Introductionmentioning

confidence: 99%

Case report: an unusual unilateral pterygium — a secondary pterygium caused by parasitosis in the scleral fistula

et al. 2021

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“…Ocular toxoplasmosis (OT) affects most commonly the retina with secondary involvement of the choroid, vitreous, and the anterior chamber [1]. The hallmark of OT is focal necrotizing retinochoroiditis, resulting in characteristic atrophic scars [2].…”

Section: Introductionmentioning

confidence: 99%

Causes of visual impairment in patients with ocular toxoplasmosis

Şahinoğlu-Keşkek

Ünal

Cevher

et al. 2017

J Infect Dev Ctries

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Introduction: The aim of this study was to report the causes of visual impairment in patients with the classic clinical presentation of ocular toxoplasmosis (OT). Methodology: Eight patients with OT underwent standardized ophthalmologic examination and fundus imaging. Macula and the lesions that could be visualized were evaluated by spectral domain optical coherence tomography (SOCT) at presentation. The scan acquisition protocols for SOCT included a radial line scan through the retinochoroiditis lesion, radial line macular scan, and horizontal volume scans at the macula. Results: The mean age of the five (62.5%) women and three (37.5%) men was 25.7±7.6 years. The mean logMAR ETDRS best-corrected visual acuity was 0.45 (Snellen equivalent, 20/50). SOCT findings of macula were normal in seven patients, and one patient had decreased retinal thickness from a healed chorioretinitis at the fovea. Of eight patients, two had 3+ vitreous haze, four had 2+ vitreous haze, and two had 1+ vitreous haze at presentation. OCT scans revealed vitreous hyperreflective dots in all patients with different densities in different radial scans. Hyperreflective dots were denser in macular scans of eyes in which the active lesion was closer to the fovea. Conclusions: In this study, visual impairment in majority of the patients was found to be related to vitreous cells and flare. Dense vitritis on macula scans and visual impairment were seen in the patients who had an active lesion closer to the fovea. SOCT may provide objective data of the cellular load of the eyes with posterior segment inflammation.

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