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Updated: Aug 7, 2026

Microdissection of the Rodent Eye
Published on: April 21, 2023
Subconjunctival dirofilariasis in India
S Nadgir1, S S Tallur, V Mangoli
1Department of Microbiology, Karnataka Institute of Medical Sciences, Hubli, India.
Abstract:
Human dirofilariasis caused by Dirofilaria repens, have been reported to occur widely throughout Asia, Europe and Africa. Reports of this infection from India are however limited. Herein we report a case of subconjunctival dirofilariasis from Karnataka state of India. A 42 year old man presented with a history of pain and swelling in the left eye. A live parasite measuring 3.5cm in length was surgically removed from the nodular swelling in the conjunctiva. The parasite was identified as Dirofilaria repens, adult male.
Insights
Human dirofilariasis, a parasitic infection caused by Dirofilaria repens, is rare in India. This report details a case of subconjunctival dirofilariasis in a man from Karnataka, highlighting the need for increased awareness of this zoonotic disease.
Area of Science:
- Veterinary parasitology
- Human and veterinary medicine
- Zoonotic diseases
Background:
- Human dirofilariasis, caused by Dirofilaria repens, is prevalent in Asia, Europe, and Africa.
- Reports of Dirofilaria repens infection in India are infrequent.
- This zoonotic filarial nematode poses a public health concern in endemic areas.
Observation:
- A 42-year-old male patient presented with ocular discomfort and swelling in the left eye.
- A live nematode, measuring 3.5 cm, was surgically extracted from a conjunctival nodule.
- The removed parasite was identified as an adult male Dirofilaria repens.
Findings:
- Successful surgical removal of the Dirofilaria repens parasite.
- Confirmation of subconjunctival dirofilariasis in an Indian patient.
- The case contributes to the limited documented evidence of this infection in India.
Implications:
- Highlights the potential for Dirofilaria repens to cause human ocular infections in India.
- Underscores the importance of accurate diagnosis and prompt treatment of dirofilariasis.
- Suggests the need for enhanced surveillance and public health awareness regarding zoonotic filariasis in the region.
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