External ophthalmomyiasis

Four cases of external ocular myiasis caused by larvae of Oestrus ovis are reported.Each patient showed some degree of inflammation in the lids and conjunctiva. Regression was only subsequent to removal of parasites from the eye.Two patients had respiratory signs, i.e. rhinitis. For one of these two cases, a short-time admission in the resuscitation unit was recommended following a noticeable bronchospasm.The pathogenetic mechanism of this respiratory distress is not known. Two hypotesis are made.     

External ophthalmomyiasis associated with herpes zoster ophthalmicus

Ophthalmomyiasis is a rare entity caused by infestation with certain dipterous larvae. We describe a 71-year-old farmer with herpes zoster ophthalmicus on the left side of the face in whom the blisters became secondarily infested with Chrysomyia bezziana maggots. The maggots were removed mechanically, and the corneal involvement secondary to zoster ophthalmicus responded to therapy with topical steroids and cycloplegics. To our knowledge this is the first report of external ophthalmomyiasis due to C. bezziana.     

External ophthalmomyiasis caused by Estrus ovis

External ophthalmomyiasis occurred in a 16-year-old white girl who was infected on Catalina Island, an endemic area for the sheep bot fly. With the patient under topical anesthesia, we isolated the larva, Estrus ovis, removed it with jewelers' forceps, and examined it with light and scanning electron microscopy. The patient responded well to a treatment regimen of corticosteroids and antibiotics.     

External ophthalmomyiasis: A case report

Ophthalmomyiasis is an infestation of the eye with larvae of most common sheep nasal botfly (Oestrus ovis). We describe a case of ophthalmomyiasis in a 50-year-old man who presented with ocular foreign body sensation, redness and tearing. The causative larvae were removed in the emergency room and sent to laboratory for identification. The patient symptoms improved after topical treatment with antibiotics–steroid combination therapy.     

External ophthalmomyiasis: a case report

Many dipteran flies can cause ophthalmomyiasis, a potentially severe and vision threatening disease. We report a case of ophthalomyiasis caused by Oestrus ovis. Larvae of Oestrus ovis are confined to the surface of the eye and cause external ophthalmomyiasis. The presentation is similar to a viral conjunctivitis, with tearing, itching, hyperaemia and foreign body sensation. The disease is self-limiting and removal of the larvae is the most effective therapy. Identification of the species is important to estimate the risk of penetration of the globe.     

External ophthalmomyiasis: a case series

Oestrus ovis or ‘sheep botfly’ causes common ophthalmomyiasis in warm climates. It is a self-limited infestation with symptoms such as foreign body sensation and/or tearing. The larvae can be observed in the conjunctiva and should be extracted with forceps. The development of larvae beyond the first stage does not occur in healthy humans, although they may penetrate the ocular globe, causing so-called internal myiasis. External ophthalmomyiasis is typical of rural areas, but it may be observed occasionally in urban environments.     

External ophthalmomyiasis: a case series and review of ophthalmomyiasis in Turkey

Ophthalmomyiasis externa is the infestation of the superficial external ocular structures by fly larvae. This is a particularly rare condition, which has nevertheless been reported in several countries worldwide. It is common in sheep-farming areas, especially in Mediterranean countries. The patients may present with classic conjunctivitis, pseudomembranous conjunctivitis, conjunctival hemorrhages, punctuate keratitis, keratouveitis, and eyelid edema with erythema. Herein, we present three cases of external ophthalmomyiasis caused by Oestrus ovis larvae and review ophthalmomyiasis cases reported from Turkey.     

Tarantula keratouveitis

PURPOSE: To report a case of chronic bilateral keratouveitis, which was initiated after contact with a pet tarantula. METHODS: A 16-year-old male presented with a photophobia and redness of his eyes two days after handling a tarantula. He was found to have a number of linear corneal foreign bodies with subepithelial infiltrates. The infiltrates were found at varying levels of the corneal stroma with deposits on the endothelium. The anterior chamber had a mild cellular reaction. RESULTS: He was treated with topical steroid drops, which made him asymptomatic. However, he continued to have a mild persistent keratitis and iritis four months after the onset. CONCLUSION: Tarantula hairs may be associated with a chronic keratouveitis, which is usually self-limiting and responds well to treatment with topical steroids. Tarantula pet owners should be forewarned of the ocular dangers associated with handling these spiders.     

A case of hypertensive keratouveitis with endotheliitis associated with cytomegalovirus

AIM: While cytomegalovirus is well known as a pathogenic organism of retinitis, especially associated with human immunodeficiency virus infection, there are few reports of anterior uveitis associated with cytomegalovirus. METHODS: The authors present a case of keratouveitis associated with cytomegalovirus. RESULTS: A 70-year-old Japanese man was referred to the authors because of poorly controlled hypertensive keratouveitis in the left eye. The patient had a history of recurrent hypertensive anterior uveitis. At presentation, the corneal stroma was edematous, with Descemet's folds and pigmented keratic precipitates. The anterior chamber angle was depigmented compared to the fellow eye. Even though pupil dilation and posterior synechiae were absent, iris atrophy was not evident. His right eye appeared normal except for moderate cataract. Funduscopy of the left eye was hazy, with the optic disc showing a normal color but poorly defined details, and no apparent exdative retinitis. The best-corrected decimal visual acuity of the right and left eyes was 0.4 and 0.02, respectively. Intraocular pressure was 11 mmHg in the right eye and 35 mmHg in the left, despite maximum medical therapy. Systemic acyclovir and prednisolone for a month did not improve the hypertensive keratouveitis. The aqueous humor was investigated for herpes simplex virus, varicella-zoster virus and cytomegalovirus. Cytomegalovius genome was detected by polymerase chain reaction analysis. Oral valganciclovir rapidly reduced ocular hypertension within a week. CMV DNA disappeared 3 months after the initiation of valganciclovir. CONCLUSION: The authors reported a case of hypertensive keratouveitis with endotheliitis associated with cytomegalovirus.