• Users Online: 126
  • Home
  • Print this page
  • Email this page

   Table of Contents      
Year : 2008  |  Volume : 56  |  Issue : 1  |  Page : 76-78

Intravitreal live adult Brugian filariasis

1 JPM Rotary Eye Hospital and Research Institute, Sec-6, CDA, Bidanasi, Cuttack, Orissa-753 014, India
2 Department of Pathology and Microbiology, SCB Medical College, Cuttack, Orissa-753 007, India

Date of Web Publication21-Dec-2007

Correspondence Address:
Nageswar G Rao
Vitreo-Retinal Services, JPM Rotary Eye Hospital and Research Institute, Sec-6, CDA, Bidanasi, Cuttack, Orissa-753 014
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0301-4738.37610

Rights and Permissions

Human ocular infestation by live filarial worm is a rare occurrence and has been reported mostly form South-East Asia. It involves the eyelids, conjunctiva, cornea, anterior chamber and uvea. No case of intravitreal Brugian microfilaria / adult worm has been found by Medline search. Here we report a case of live intravitreal adult Brugian filaria, where the parasite was successfully removed by pars plana vitrectomy. Identification of the worm was done by light microscopy and confirmed by immuno chromatographic test.

Keywords: Brugia malayi, intravitreal filariasis, ocular infestation

How to cite this article:
Rao NG, Mahapatra SK, Pattnayak S, Pattnaik K. Intravitreal live adult Brugian filariasis. Indian J Ophthalmol 2008;56:76-8

How to cite this URL:
Rao NG, Mahapatra SK, Pattnayak S, Pattnaik K. Intravitreal live adult Brugian filariasis. Indian J Ophthalmol [serial online] 2008 [cited 2022 Nov 27];56:76-8. Available from: https://www.ijo.in/text.asp?2008/56/1/76/37610

Intraocular infestation by the filarial worm is a rare occurrence in humans. Most of the published reports are from South-East Asia.[1] We report a very rare case of intravitreal Brugian filarial worm, where the worm was removed live and intact by pars plana vitrectomy.

  Case History Top

A 35-year-old male presented to us with complaints of "something moving in front of his left eye for two days". His visual acuity was 20/20 in both eyes. Anterior segment findings were within normal limits. Indirect ophthalmoscopy of the left eye showed clear ocular media, but there was a motile whitish thread-like worm entangled with vitreous strands found near the optic disc [Figure - 1]. Posterior segment of the right eye showed no abnormality.

The patient had history of recurrent fever. Peripheral blood smear examination showed eosinophil count of 523/l of blood but no detectable microfilaria. Systemic examination revealed no abnormality. Chest X-ray was normal. No cutaneous lesions were seen. Routine and microscopic examination of urine showed no abnormality.

Pars plana vitrectomy was planned to remove the worm live and intact. Limited vitrectomy was carried out leaving vitreous strands around the worm intact, which helped in removing the parasite by grasping the vitreous strands around it [Figure - 2]. The worm measuring 30 mm in length and 0.1 mm in diameter was alive and actively motile upon removal from the eye. It was sent to the parasitologist and on light microscopy identified to be adult filarial worm because of twisted body curves with smooth cuticle, fine transverse striations, ventrally coiled tail [Figure - 3] and the slightly swollen head end[2] [Figure - 4]. Immuno chromatographic test (ICT) for filarial antigen was negative. The sensitivity and specificity of ICT for filarial antigen (W. bancrofti) is 96 to 100% and 95 to100% respectively.[3] This helped us to diagnose the worm as adult Brugian filarial worm and most probably Brugia malayi as this is the only other filarial worm found in the Indian subcontinent according to the literature.[3]

  Discussion Top

Brugia malayi is a helminth belonging to class Nematodes. Man is the definitive host for Brugia malayi, the intermediate host being species of mansonian mosquitoes. Adult worms live in the lymphatic system discharging live embryos (microfilaria) into the bloodstream, which are capable of living in the peripheral blood for a considerable period of time without undergoing any developmental metamorphosis. Microfilarae are taken up by the intermediate host where they undergo further development becoming infective for man.[3],[4]

Usually pathogenicity of B. malayi is due to lymphangitis and elephantiasis. But rarely, microfilarae move out of lymphatics or blood circulation and can come to extravascular sites like the eye (vitreous cavity). The exact mode of entry of such helminths into the vitreous cavity is not known. The possible modes may be from choriocapillaries through the retinal layers as in a few reported cases of intravitreal Gnathostomiasis or through the optic nerve head.[5]

The most common clinical presentation of ocular filarial infestation is chemosis, lid edema orbital cellulitis, anterior uveitis or worm in the anterior chamber. But no case of intravitreal adult Brugian filarial worm has been found by Medline search.

Once a parasite is identified in the vitreous cavity it should be removed immediately, live and intact as (i) it is capable of migrating to various parts of the eye and could cause structural damage and severe intraocular reaction (ii) severed parasite may cause serious intraocular inflammation (iii) intact parasite is necessary for proper identification of species and any systemic treatment if needed for it.[5],[6]

This very rare case of intravitreal Brugian filariasis illustrates that larval stage of lymphatic filariasis can reach vitreous cavity and grow into its adult form and may cause visual problem. Removal of the living intact parasite is necessary not only for symptomatic relief or visual rehabilitation but also for prevention of intraocular inflammation due to damage or death of the parasite.

  References Top

Dissanaike AS, Bandara CD, Padmini HH, Ihalamulla RL, Naotunne TS. Recovery of a species of Brugia, probably B. ceylonensis, from the conjunctiva of a patient in Sri Lanka. Ann Trop Med Parasitol 2000;94:83-6.  Back to cited text no. 1
Ichhpujani RL, Bhatia R. Medical parasitology: Filariasis. 3rd ed, Jaypee Brothers: New Delhi; 2002. p. 160-1.  Back to cited text no. 2
Babu S, Nutman TB. Lymphatic filariasis. In: Cox FE, Wakelin D, Gillespie SH, Despommier DD, editors. Topley and Wilsen's Microbiology and Microbial infection (Parasitology). 10th ed. Hodder Arnold: London; 2005. p. 769-80.  Back to cited text no. 3
Orihel TC, Eberhard ML. Zoonotic filariasis. Clin Microbiol Rev 1998;11:366-81.  Back to cited text no. 4
Biswas J, Gopal L, Sharma T, Badrinath SS. Intraocular gnathostoma spinigerum: Clinico-pathological study of two cases with review of Literature. Retina 1994;14:438-44.   Back to cited text no. 5
Basak SK, Sinha TK, Debasis B, Tushar KH, Parikh S. Intravitreal live gnathostoma spinigerum. Indian J Ophthalmol 2004;52:57-8.  Back to cited text no. 6
[PUBMED]  Medknow Journal  


  [Figure - 1], [Figure - 2], [Figure - 3], [Figure - 4]

This article has been cited by
1 A rare case of subconjunctival Onchocerca volvulus
Siddharth Kumar, Antarlin Ghosal, Ramamani Dalai, Dharitri Mohapatra, Soumya Nayak
Indian Journal of Ophthalmology - Case Reports. 2021; 1(2): 186
[Pubmed] | [DOI]
2 Surgical management of a live intravitreal nematode
David T. Ta Kim, Amrit S. Rai, Rajeev H. Muni
American Journal of Ophthalmology Case Reports. 2020; 19: 100721
[Pubmed] | [DOI]
3 Wandering intravitreal worm of Brugia malayi from Central India
Gitumoni Sharma, Deepshikha Agrawal
Indian Journal of Ophthalmology. 2020; 68(6): 1166
[Pubmed] | [DOI]
4 A case report of Brugian filariasis outside an endemic area in Thailand
S. Yokmek,W. Warunyuwong,S. Rojanapanus,C. Jiraamornimit,J.J. Boitano,S. Wongkamchai
Journal of Helminthology. 2013; 87(04): 510
[Pubmed] | [DOI]
5 Zoonotic helminths affecting the human eye
Domenico Otranto, Mark L Eberhard
Parasites & Vectors. 2011; 4(1): 41
[VIEW] | [DOI]
6 Arthropod Vector-Borne Uveitis in the Developing World :
Moncef Khairallah, Salim Ben Yahia, Sonia Attia
International Ophthalmology Clinics. 2010; 50(2): 125
[VIEW] | [DOI]


    Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
    Access Statistics
    Email Alert *
    Add to My List *
* Registration required (free)  

  In this article
Case History
Article Figures

 Article Access Statistics
    PDF Downloaded290    
    Comments [Add]    
    Cited by others 6    

Recommend this journal