Ophthalmomyiasis as a cause of canalicular lesion

Abstract

Objetivo: Miíase é a invasão de tecido humano pela larva de uma mosca da ordem Díptera. O envolvimento ocular não é comum. Lesões do aparelho lacrimal geralmente estão associadas a traumas e raramente são devidas a infestações parasitárias. O objetivo deste trabalho é relatar um caso de laceração canalicular causado por larva de Dermatobia hominis.Descrição: Criança do sexo feminino, 8 anos de idade, apresentou-se com celulite pré-septal não responsiva a antibioticoterapia. Foi observada uma larva de D. hominis no saco lacrimal. Realizou-se a extração cirúrgica da larva e observou-se lesão do sistema de drenagem lacrimal.Comentários: A infestação parasitária em via lacrimal é rara. A extração cirúrgica da larva é recomendada como tratamento de escolha. Apesar de incomum, a oftalmomiíase deve ser considerada como um diagnóstico diferencial possível em celulites não responsivas ao tratamento convencional, especialmente em áreas endêmicas. Esta é a primeira descrição de lesão do sistema de drenagem lacrimal por larva de D. hominis. 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.J Pediatr (Rio J). 2005;81(1):85-7: Miasis, cellulitis, parasitic eye infections, lacerations, lacrimal apparatus.

Animal-inflicted ocular and adnexal injuries in children: A systematic review

“…The one retrospective review found 6.15% of external ophthalmomyiasis cases occurred in individuals younger than 5 years. 37 The clinical manifestations of external ophthalmomyiasis fell into 3 groups: lid myiasis (48.6%), 24,27,39,46,62,79,101,114,116,120,122,129,139,158 ocular surface myiasis (45.9%), 5,15,22,39,44,65,66,84,104,115,130,138,145,150,166 and orbital infestation (25.4%). 41,129 The mean age for the overall cohort was 9.1 years (range, 12 days to 17 years).…”

“…41 The culprit larva was identified in 83.3%% of lid myiasis cases, 67.4% of ocular surface cases, and in 1 of the 2 orbital cases. Dermatobia hominis was the most common larva to cause lid myiasis (8 of 14 cases) 46,114,120,122,158 followed by Cuterebra larva (3 of 14 cases). 62,79,116 There were single lid myiasis cases of Chrysomya bezziana, 24 Lucilia, 27 reindeer Warble fly, 139 and Wohlfahrtia magnifica.…”

Ophthalmomyiasis in a case of basal cell carcinoma of eyelid

“…It is more likely to occur in the subsection of the population who face social isolation and especially in those consuming alcohol regularly. [7][8][9] Ophthalmomyiasis is termed as external, when the involvement is limited to the superficial periocular tissues including the palpebral and conjunctival myiasis without sclera or conjunctival penetration. Once it penetrates the conjunctiva or sclera and migrates to the subretinal space, it is termed as internal ophthalmomyiasis.…”

Myiasis Infections in Animals and Men

“…11). The life cycle is very complex and requires a flying arthropod to transport its eggs to a mammalian vertebrate, which include cattle, dogs, cats, pigs and man (Sancho 1988;Pereira Da Silva et al 1998;Brizuela et al, 2003;Maier and Honigsmann 2004;Saraiva et al 2005). The adult fly is bottle blue in colour.…”