A first record from Thailand of human external ophthalmomyiasis due to Oestrus ovis.

A case of external ophthalmomyiasis caused by Oestrus ovis was first reported from Lopburi Province, Central part of Thailand, in January, 1997. A 18-year-old man presented with a several hours history of foreign body sensation in his left eye accompanied by irritation. Eight Oestrus ovis first-instar larvae were removed from lower palpebral conjunctiva. Symptoms and clinical signs resolved in 24 hours after mechanical removal of the larvae. There was no history of contact fly and domestic animals. The larvae were identified by light microscopic examination.