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Br J Ophthalmol 84:439 doi:10.1136/bjo.84.4.439c
  • Letter to the Editor

Five cases of thelaziasis

  1. YASUROU KOYAMA
  1. Division of Ophthalmology, Muikaichi Hospital, Muikaichi, Shimane, Japan
  2. Department of Ophthalmology, Shimane Medical University, Izumo, Shimane, Japan
  3. Division of Ophthalmology, Tsuwanokyouzon Hospital, Tsuwano, Shimane, Japan
  4. Department of 2nd Environment Medicine, Shimane Medical University, Izumo, Shimane, Japan
  • Accepted 8 December 1999
  1. AKIHIRO OHIRA
  1. Division of Ophthalmology, Muikaichi Hospital, Muikaichi, Shimane, Japan
  2. Department of Ophthalmology, Shimane Medical University, Izumo, Shimane, Japan
  3. Division of Ophthalmology, Tsuwanokyouzon Hospital, Tsuwano, Shimane, Japan
  4. Department of 2nd Environment Medicine, Shimane Medical University, Izumo, Shimane, Japan
  • Accepted 8 December 1999
  1. TATSURO KONO
  1. Division of Ophthalmology, Muikaichi Hospital, Muikaichi, Shimane, Japan
  2. Department of Ophthalmology, Shimane Medical University, Izumo, Shimane, Japan
  3. Division of Ophthalmology, Tsuwanokyouzon Hospital, Tsuwano, Shimane, Japan
  4. Department of 2nd Environment Medicine, Shimane Medical University, Izumo, Shimane, Japan
  • Accepted 8 December 1999
  1. TOSHIMI YONEYAMA,
  2. KUNINORI SHIWAKU
  1. Division of Ophthalmology, Muikaichi Hospital, Muikaichi, Shimane, Japan
  2. Department of Ophthalmology, Shimane Medical University, Izumo, Shimane, Japan
  3. Division of Ophthalmology, Tsuwanokyouzon Hospital, Tsuwano, Shimane, Japan
  4. Department of 2nd Environment Medicine, Shimane Medical University, Izumo, Shimane, Japan
  1. Dr Akihiro Ohira, Department of Ophthalmology, Shimane Medical University, 89-1, Enya, Izumo, Shimane, 693-8501, Japan
  • Accepted 8 December 1999

Editor,—We report five cases of thelaziasis, including a rare case of infection of a hospital inpatient. Thelaziasis is a nematode infection of ocular tissue that is caused by Thelazia callipaeda, which is found in China, India, Thailand, Korea, and Japan. This parasite has been identified in the conjunctival sac, and lacrimal gland and canal of dogs, cats, cows, badgers, rabbits, foxes, and monkeys in Asia.1

Thelaziasis results when flies ingest embryonated eggs in the ocular tissue of an infected host; the eggs develop into larvae and are deposited onto the conjunctiva of a new host. Drosophilae—namely,Amioto okadai, A magna, …

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