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Human ophthalmomyiasis interna caused by Hypoderma tarandi, Northern Canada.

ABSTRACT: Human myiasis caused by bot flies of nonhuman animals is rare but may be increasing. The treatment of choice is laser photocoagulation or vitrectomy with larva removal and intraocular steroids. Ophthalmomyiasis caused by Hypoderma spp. should be recognized as a potentially reversible cause of vision loss.

SUBMITTER: Lagace-Wiens PR

PROVIDER: S-EPMC2600172 | biostudies-literature |

REPOSITORIES: biostudies-literature

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"Pacman" invasion of the retina: Two cases of ophthalmomyiasis interna posterior.

Project description:PurposeTo discuss two striking cases of ophthalmomyiasis interna posterior, in which the larval stage of a botfly is found in the posterior segment.ObservationsIn the first case, the subretinal maggot is alive and found to be migrating under the retina. The maggot was lasered in the office and killed. In the second case, a dead maggot was discovered in the subretinal space in a child, after it had caused significant subretinal scarring and permanent vision loss.Conclusions and importanceOphthalmomyiasis is a rare condition that can often be unrecognized and result in permanent vision loss. Early diagnosis and photocoagulation of the larva (if alive) can halt progression of vision loss in these cases.

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Outcomes of pars plana vitrectomy in three cases of ophthalmomyiasis interna.

Project description:PurposeTo report the outcomes of pars plana vitrectomy in three cases of ophthalmomyiasis interna.ObservationsCase 1 is a 15-year-old male with a mobile lenticular gray-white larva in the vitreous. Case 2 is a 4-year-old female with a floating larva in the optic axis. Case 3 is an 8-year-old female with a floating larva in the optic axis; however, intraoperatively, the larva was found subretinally. In all cases, 25-gauge pars plana vitrectomy was performed.Conclusions and importanceOphthalmomyiasis interna is a rare parasitic eye disease that occurs when larvae of flies or gadflies enter the anterior chamber or/and posterior segment. Pars plana vitrectomy is an effective method of dealing with ophthalmomyiasis interna allowing to reach the main goal of treatment: removing the larva and restoring the eye structures. It is necessary to start treatment as soon as possible to prevent complications associated with mechanical injury and the prolonged toxic effect of larval immunogenic materials.

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External Ophthalmomyiasis Caused by a Rare Infesting Larva, Sarcophaga argyrostoma.

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Project description: Not available

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Human myiasis caused by the reindeer warble fly, Hypoderma tarandi, case series from Norway, 2011 to 2016.

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