Intraocular Gnathostomiasis: Report of a Case and Review of Literature

Gopal S. Pillai Departments of Ophthalmology, Microbiology, and Pathology, Amrita Institute of Medical Sciences, Ponekara, Kochi, Kerala, India

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Anil Kumar Departments of Ophthalmology, Microbiology, and Pathology, Amrita Institute of Medical Sciences, Ponekara, Kochi, Kerala, India

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Natasha Radhakrishnan Departments of Ophthalmology, Microbiology, and Pathology, Amrita Institute of Medical Sciences, Ponekara, Kochi, Kerala, India

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Jayasree Maniyelil Departments of Ophthalmology, Microbiology, and Pathology, Amrita Institute of Medical Sciences, Ponekara, Kochi, Kerala, India

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Tufela Shafi Departments of Ophthalmology, Microbiology, and Pathology, Amrita Institute of Medical Sciences, Ponekara, Kochi, Kerala, India

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Kavitha R. Dinesh Departments of Ophthalmology, Microbiology, and Pathology, Amrita Institute of Medical Sciences, Ponekara, Kochi, Kerala, India

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Shamsul Karim Departments of Ophthalmology, Microbiology, and Pathology, Amrita Institute of Medical Sciences, Ponekara, Kochi, Kerala, India

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Intraocular gnathostomiasis is a rare parasitic infection caused by the third-stage larvae of spiruroid nematode Gnanthostoma spp. seen mostly in tropical and subtropical regions. It is a food-borne zoonosis caused by ingestion of raw or undercooked freshwater fish, amphibians, reptiles, birds, and mammals, all of which are known to harbor advanced third-stage larvae of Gnanthostoma spp. To date, 74 cases of intraocular gnathostomiasis have been reported from 12 different countries. Only four countries have reported more than 10 cases each, and India shares the rare distinction of being one of them, with 14 cases. Surprisingly, not a single case of cutaneous gnanthostomiasis has ever been reported from India. We present one such case of intraocular gnathostomiasis in a 41-year-old male who presented with an actively motile worm attached to the iris, and we review the pertinent literature of all such cases reported from India.

Author Notes

*Address correspondence to Anil Kumar, Department of Microbiology, Amrita Institute of Medical Sciences, Amrita Lane, Ponekkara, Kochi, Kerala, India 682041. E-mail: vanilkumar@aims.amrita.edu

Authors' addresses: Gopal S. Pillai, Natasha Radhakrishnan, and Tufela Shafi, Department of Ophthalmology, Amrita Institute of Medical Sciences, Ponekkara, Kochi, Kerala, India, E-mails: gopalspillai@gmail.com, natashar@aims.amrita.edu, and tufelashafi@aims.amrita.edu. Anil Kumar, Kavitha R. Dinesh, and Shamsul Karim, Department of Microbiology, Amrita Institute of Medical Sciences, Ponekkara, Kochi, Kerala, Inida, E-mails: vanilkumar@aims.amrita.edu, kavitharadhakrishnan@aims.amrita.edu, and shamsulkarim@aims.amrita.edu. Jayasree Maniyelil Department of Pathology, Amrita Institute of Medical Sciences, Ponekkara, Kochi, Kerala, India, E-mail: shaji.aims@gmail.com.

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