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Subconjunctival Dirofilariasis Presenting as Orbital Cellulitis.

Smitha K Shambhu1, Praveen R Murthy1, Placid E D'souza2

  • 1Department of Orbit and Oculoplasty, Prabha Eye Clinic and Research Center.

Ophthalmic Plastic and Reconstructive Surgery
|June 18, 2019
PubMed
Summary

Human ocular Dirofilariasis, a rare zoonotic disease caused by Dirofilaria repens, typically presents as a subconjunctival nodule. This case highlights a rare presentation of orbital cellulitis due to this parasitic eye infection.

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Area of Science:

  • Veterinary Ophthalmology
  • Parasitology
  • Zoonotic Diseases

Background:

  • Human ocular Dirofilariasis is an uncommon zoonotic parasitic infection.
  • It is caused by the nematode Dirofilaria repens.
  • Typical clinical presentation involves a subconjunctival nodule with hyperemia.

Observation:

  • A 91-year-old male presented with symptoms mimicking orbital cellulitis.
  • Ocular examination revealed signs suggestive of parasitic infestation.
  • The patient's condition was investigated for unusual causes of orbital inflammation.

Findings:

  • A live filarial worm was surgically removed from the subconjunctival space.
  • The identified nematode was confirmed to be Dirofilaria repens.
  • Histopathological analysis supported the diagnosis of Dirofilaria repens infestation.

Implications:

  • This case expands the known clinical spectrum of ocular Dirofilariasis.
  • It underscores the importance of considering parasitic infections in orbital inflammatory conditions.
  • Prompt surgical intervention is crucial for managing ocular Dirofilariasis and preventing complications.