Cases reported "Onchocerciasis, Ocular"

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1/6. Subconjunctival zoonotic onchocerca in an Albanian man.

    A case of subconjunctival infection with a zoonotic species of onchocerca is described, in a 16-year-old Albanian man who had immigrated to greece. This is the first report of human infection with onchocerca in this tissue location and only the eighth report of zoonotic onchocerca in man. ( info)

2/6. onchocerciasis (river blindness).

    A 37-year-old African man presented for excision of a dermal nodule after a diagnosis of ocular onchocerciasis (river blindness). A nodule from the patient's left buttock contained several adult filarial worms, and results from adjacent skin biopsy specimens revealed numerous dermal microfilariae. The patient was admitted to the hospital and treated with one dose of ivermectin. Recommendations were made for ivermectin treatments every 6 months for up to 10 years. The history, clinical presentation, diagnosis, and treatment of onchocerciasis are discussed. ( info)

3/6. Zoonotic intravitreal onchocerca in hungary.

    OBJECTIVE: To report the case of a 65-year-old male patient from western hungary who presented with rapidly progressive peripheral visual field (VF) loss and the sensation of an actively moving object in his central VF. DESIGN: Interventional case report. METHOD/INTERVENTION: A live nematode was removed from the anterior vitreous cavity by pars plana vitrectomy. RESULTS: The worm was successfully removed surgically, and the patient had an uneventful recovery. The nematode was identified as an immature filaria, most likely a member of the genus onchocerca. CONCLUSIONS: Only 3 previous reports exist of human infection of the eye caused by zoonotic onchocerca, 2 involving the subconjunctiva and 1 the cornea. Although rare, zoonotic onchocercal infection of the eye must be considered a differential diagnostic entity even in temperate climates. ( info)

4/6. Clinical and pathological features of chronic glaucoma in north-east ghana.

    Of 34 consecutive patients with chronic glaucoma seen in north-east ghana, 22 (65%) were male and seven (21%) were aged under 40 years. Only 17% of eyes had a visual acuity better than 6/18 at presentation. Sixteen of 23 patients who underwent gonioscopy had PAS of which 13 had positive skin snips for onchocerciasis, compared with two out of seven patients with positive skin snips who had open angle glaucoma (p = 0.003). Of 22 trabecular meshworks examined by light microscopy ten (45%) showed marked melanin pigmentation which was more common in younger patients but did not correlate with onchocerciasis infection. ( info)

5/6. Socioeconomic consequences of blinding onchocerciasis in west africa.

    onchocerciasis or river blindness, a major cause of irreversible blindness among adults, has been the focus of international disease control efforts for over 20 years in West africa. This paper employs the international classification of impairment, disability and handicap (ICIDH) to interpret results from a field study to assess the socioeconomic consequences of onchocerciasis in guinea in 1987. In a sample of 136 blind, 94 visually impaired and 89 well-sighted persons, decreasing visual acuity is strongly associated with mobility, occupational and marital handicaps. Individual, household and disease correlates were explored. The implications of these findings for the ICIDH concept of handicap are discussed with particular emphasis on the need to extend analysis beyond the individual when assessing the socioeconomic consequences of disabling disease. ( info)

6/6. Zoonotic onchocerca (nematoda:filarioidea) in the cornea of a colorado resident.

    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. ( info)

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