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[Vitreoretinal dirofilariasis].

E Frieling1, E Fritz, U Schmidt

  • 1Augenabteilung des Bundeswehrkrankenhauses Ulm.

Klinische Monatsblatter Fur Augenheilkunde
|April 1, 1990
PubMed
Summary
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A patient experienced vision issues after travel, which were caused by a Dirofilaria worm. Treatment with diethylcarbamazine and thiabendazole successfully removed the parasite, restoring vision.

Area of Science:

  • Ophthalmology
  • Parasitology
  • Tropical Medicine

Background:

  • Ocular parasitic infections can cause significant visual impairment.
  • Travel to endemic regions increases the risk of exposure to zoonotic parasites.
  • Dirofilaria species are known to cause various clinical manifestations in animals and occasionally humans.

Observation:

  • A 41-year-old patient presented with symptoms of moving shadows and reduced vision post-travel to southern Europe and central Africa.
  • Ophthalmoscopic examination revealed an agile, whitish worm, approximately 6 mm long, located anterior to the macula and subsequently in the vitreous humor.
  • The worm's morphology was distinct, ruling out common helminths and human filariae.

Findings:

  • Morphological and chemical analyses were conducted on the observed worm.

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  • The parasite was identified as a likely animal parasite belonging to the genus Dirofilaria.
  • Successful treatment was achieved using diethylcarbamazine (Hetrazan) and thiabendazole (Mintizol).

    • Implications:

    • This case highlights the potential for Dirofilaria to cause ocular dirofilariasis in humans.
    • Prompt diagnosis and antiparasitic treatment are crucial for managing ocular filarial infections.
    • Increased awareness among clinicians regarding zoonotic eye infections in travelers is warranted.