TNOA Journal of Ophthalmic Science and Research

OPHTHALMIC IMAGE
Year
: 2020  |  Volume : 58  |  Issue : 4  |  Page : 316--317

Unilateral ophthalmomyiasis externa


Shruthy Vaishali Ramesh1, Prasanna Venkatesh Ramesh2, Ramesh Rajasekaran3, Meena Kumari Ramesh1,  
1 Department of Cataract and Refractive Surgery, Ophthalmology and Strabismus, Mahathma Eye Hospital Private Limited, Trichy, Tamil Nadu, India
2 Department of Glaucoma and Research, Ophthalmology and Strabismus, Mahathma Eye Hospital Private Limited, Trichy, Tamil Nadu, India
3 Department of Paediatric Ophthalmology and Strabismus, Ophthalmology and Strabismus, Mahathma Eye Hospital Private Limited, Trichy, Tamil Nadu, India

Correspondence Address:
Dr. Prasanna Venkatesh Ramesh
Mahathma Eye Hospital Private Limited, No.6, Seshapuram, Thennur, Trichy - 620 017, Tamil Nadu
India




How to cite this article:
Ramesh SV, Ramesh PV, Rajasekaran R, Ramesh MK. Unilateral ophthalmomyiasis externa.TNOA J Ophthalmic Sci Res 2020;58:316-317


How to cite this URL:
Ramesh SV, Ramesh PV, Rajasekaran R, Ramesh MK. Unilateral ophthalmomyiasis externa. TNOA J Ophthalmic Sci Res [serial online] 2020 [cited 2022 Dec 1 ];58:316-317
Available from: https://www.tnoajosr.com/text.asp?2020/58/4/316/303666


Full Text



A 20-year-old male presented with foreign body sensation and redness in his left eye. On eversion of the lid, conjunctival congestion and a motile, translucent worm were noted, which depicted photo-aversion. The worm were removed and sent for histopathology. The prominent features of the Oestrus ovis larva were observed [Figure 1] with a segmented translucent body; white cephalopharyngeal skeleton; and characteristic curved, dark oral hooklets. Conjunctival ophthalmomyiasis is commonly caused by O. ovis (sheep bot fly).[1],[2] Ophthalmomyiasis externa should be a differential diagnosis in the cases of unilateral conjunctivitis, especially in those living near a farm.[3]{Figure 1}

Oestrus ovis belongs to the Class: Insecta, Order: Diptera and Family: Oestridae. It is the most common cause of human myiasis.[4]

The fly deposits hatched larvae, during flight on the moist surfaces such as nasal mucosa of sheep and cattle and accidentally human eyes. Man is an accidental host and hence the ocular myiasis in humans may be a rare condition. These larvae can penetrate intact skin and conjunctival mucus membrane, and manifest as ophthalmomyiasis.[5]

Ophthalmomyiasis can be classified into three types based on their location:[6] External Ophthalmomyiasis where larvae are present on the lids and ocular surface. It may present as conjunctivitis, preseptal cellulitis or keratouveitis. When there is penetration of larva into aqueous, iris, vitreous or sub retinal space it is called as internal ophthalmomyiasis. In orbital ophthalmomyiasis there is Involvement of ocular adnexa and optic nerve. It is the most destructive type.

It is known that internal ophthalmomyiasis and orbital ophthalmomyiasis are a sequelae of external disease, though it is very rare. But keeping in mind the possibility of such scenarios it is mandatory to do a thorough posterior segment evaluation during followup visits.[7]

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form, the legal guardian has given his consent for images and other clinical information to be reported in the journal. The guardian understands that names and initials will not be published and due efforts will be made to conceal identity, but anonymity cannot be guaranteed.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.

References

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2Choudhary P, Rathore MK, Dwivedi P, Lakhtakia S, Chalisgaonkar C, Dwivedi A. Red eye: Rule out ophthalmomyiasis too. Indian J Ophthalmol 2013;61:293-5.
3Al-Amry M, Al-Saikhan FI, Al-Dahmash S. External ophthalmomyiasis: A case report. Saudi J Ophthalmol 2014;28:322-4.
4Dunbar J, Cooper B, Hodgetts T, Yskandar H, van Thiel P, Whelan S, et al. An outbreak of human external ophthalmomyiasis due to Oestrus ovis in southern Afghanistan. Clin Infect Dis 2008;46:e124–6.
5Beaver P.C., Jung R.C., Cupp E.W. 9th ed. Lea & Febiger; Philadelphia, USA: 1984. Clinical parasitology; pp. 680-95.
6Gregory AR, Schatz S, Laubach H. Ophthalmomyiasis caused by the sheep bot fly Oestrus ovis in northern Iraq. Optom Vis Sci 2004;81(8):586–90.
7Thakur K, Singh G, Chauhan S, Sood A. Vidi, vini, vinci: External ophthalmomyiasis infection that occurred, and was diagnosed and treated in a single day: A rare case report. Oman J Ophthalmol 2009 Sep;2(3):130-2.