Oftalmomiíase como causa de lesão canalicular

Abstract

Objective: Myiasis is the invasion of human tissues by Diptera larvae. Ocular involvement is uncommon. Trauma is the major cause of lacrimal apparatus lesions. However, it is rarely associated with parasitic infestation. The objective of this paper is to report a case of canalicular laceration caused by Dermatobia hominis larva.Description: An eight-year-old girl presented preseptal cellulitis that was refractive to antibiotics. A Dermatobia hominis larva was observed inside the lacrimal sac. Surgical extraction was performed and laceration of the lacrimal drainage system was noted.Comments: Parasitic infection of the lacrimal apparatus is rare. Surgical extraction is the treatment of choice in such cases. Despite being uncommon, ophthalmomyiasis should be considered as a possible diagnosis when cellulitis is not responsive to antibiotics, especially in endemic areas. This is the first description of lacrimal drainage system injury by Dermatobia hominis larva.

Myiasis

“…Lachrymal gland myiasis may complicate conjunctival infestation, and a canalicular lesion may also follow external ocular myiasis (297). Migration through the lacrimal canal to the nose cavity is a possibility (104).…”

“…Other differential diagnoses of this clinical picture include catarrhal conjunctivitis, keratitis (324), periorbital or preseptal cellulitis (102,297,364), keratouveitis (174), and chalazion (363).…”

“…The majority of cases have been described in the Mediterranean basin and Middle East (49,78,94,158,174,331). Other agents implicated in this form of disease are Rhinoestrus purpureus (97), D. hominis (30,91,135,277,297), C. bezziana (53), Lucilia spp. (167), and Cuterebra (110).…”

Ophtalmomyiasis Externa Severe Eye Trauma:A Case Report

“…In response to the movement of the larva across the external surface of the globe, any of the following symptoms may be found on ophthalmologic examination: red eye, photophobia, conjunctival hyperemia, lid edema, punctate conjunctival hemorrhages, pseudomembrane formation, and superficial punctate keratopathy [9][10][11][12]. Lacrimal gland myiasis may complicate conjunctival infestation, and a canalicular lesion may also follow external ocular myiasis [13]. Migration through the lacrimal canal to the nasal cavity is a possibility [14].…”