Ocular thelaziasis in Thailand: a case report.

Ocular thelaziasis in an 1-year-old boy from Phetchabun province was reported. A total of eleven worms was removed from his right conjunctival cul-de-sac. Only three males and four females were available for parasitological examination, and identified as Thelazia callipaeda, based on the position of the vulva relative to the esophagointestinal junction in the females, the pattern and number of caudal papillae and the presence of unequal spicules in the males. Subsequent survey of dogs in the vicinity of patient's home revealed the same species as those from the patient. Possible mode of infection in this patient was discussed.