Thelaziasis

AI Insight

Thelaziasis is a parasitic eye infection caused by nematode worms of the genus Thelazia, transmitted to humans through flies that feed on ocular secretions. The condition, more commonly reported in Asia and Europe, presents with symptoms including foreign body sensation, excessive tearing, conjunctival inflammation, and visible worms in the conjunctival sac. Diagnosis is made by direct visualization of the parasites, and treatment involves mechanical removal of the worms, often supplemented with antiparasitic medications.

Why it matters

This infection represents an emerging zoonotic disease that can be easily overlooked by clinicians unfamiliar with the condition, potentially leading to corneal damage if untreated. Increased global travel and climate change may expand the geographic range of vector flies, making awareness of this condition important for ophthalmologists and primary care physicians worldwide.