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Volume 32, Number 7—July 2026

Research Letter

Ophthalmomyiasis Outbreak Caused by Oestrus ovis Infection, Algeria, 2025

Yuyang Zeng1, Hongkuan Yang1, Xin Li, Hongzheng Yang, and Yunyun ZhouComments to Author 
Author affiliation: Byers Eye Institute at Stanford University School of Medicine, Palo Alto, California, USA (Y. Zeng); Renmin Hospital of Wuhan University, Wuhan, China (Y. Zeng, Y. Zhou); Huazhong University of Science and Technology, Wuhan (Hongkuan Yang, X. Li); Renhe Hospital Affiliated with People’s Republic of China Three Gorges University, Yichang, China (Hongzheng Yang).

Main Article

Figure 2

Morphologic identification of Oestrus ovis larvae extracted from patients with acute external ophthalmomyiasis after sheep exposure during Eid al-Adha, Algeria, 2025. A, B) Extracted first-instar larva from the ocular surface is shown grossly. C–E) Microscopic examination demonstrates characteristic features of O. ovis, including prominent oral hooks connected to the internal cephalopharyngeal skeleton and multiple rows of spiny projections. Original magnification ×40 (panel C), ×10 (panel D), and ×100 (panel E).

Figure 2. Morphologic identification of Oestrus ovis larvae extracted from patients with acute external ophthalmomyiasis after sheep exposure during Eid al-Adha, Algeria, 2025. A, B) Extracted first-instar larva from the ocular surface is shown grossly. C–E) Microscopic examination demonstrates characteristic features of O. ovis, including prominent oral hooks connected to the internal cephalopharyngeal skeleton and multiple rows of spiny projections. Original magnification ×40 (panel C), ×10 (panel D), and ×100 (panel E).

Main Article

1These first authors contributed equally to this article.

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Page updated: June 24, 2026
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