Rare Thelazia californiensis infant ocular infestation

Sydney Roston, J. Erik Kulenkamp, Patricia Ferrieri, Sasha Strul

Research output: Contribution to journalArticlepeer-review


Purpose: A rare case of Thelazia californiensis ocular infestation was diagnosed and treated in an 11-month-old patient. Observations: The patient presented with a visual acuity of 20/130 OU by Teller cards. Exam demonstrated a white, mobile worm in the inferomedial fornix of the right eye. The remainder of the exam was otherwise normal. The worm was removed under anesthesia and identified as Thelazia californiensis by the Division of Parasitic Diseases and Malaria, at the Centers for Disease Control and Prevention. Conclusions and importance: This case demonstrates a rare but important cause of follicular conjunctivitis and mobile foreign bodies, especially in patients with a supportive history of exposure to the intermediate and definitive hosts of Thelazia species.

Original languageEnglish (US)
Article number101813
JournalAmerican Journal of Ophthalmology Case Reports
StatePublished - Jun 2023

Bibliographical note

Funding Information:
A thank you to the Division of Parasitic Diseases and Malaria, at the Centers for Disease Control and Prevention who examined the provided worms, identified them to speciation, and to the technologists, Kathleen Ormberg and Susan Johnson in the Parasitology Section of the Infectious Diseases Diagnostic Laboratory, University of Minnesota Medical Center, Fairview.

Publisher Copyright:
© 2023 The Authors


  • Acute conjunctivitis
  • Follicular conjunctivitis
  • Foreign body
  • Infectious disease
  • Pediatric ophthalmology

PubMed: MeSH publication types

  • Case Reports


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