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Pathogens
Article . 2025 . Peer-reviewed
License: CC BY
Data sources: Crossref
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Pathogens
Article . 2025
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PubMed Central
Conference object . 2025
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Update on Ophthalmic Implications of Highly Pathogenic Avian Influenza A (H5N1) Virus

Authors: Timothy Kaftan; Nam V. Nguyen; Jack Begley; Tolulope Fashina; Jessica Carag; Steven Yeh;

Update on Ophthalmic Implications of Highly Pathogenic Avian Influenza A (H5N1) Virus

Abstract

Introduction: Highly Pathogenic Avian Influenza (HPAI) A(H5N1) represents a growing public health challenge, given broadening zoonotic vectors, with a previously reported human mortality rate of roughly 50%. Late March 2024 marked the start of a new outbreak of HPAI A(H5N1) in the United States. While offering unique public health challenges, this outbreak also provides insight into clinical presentation and ocular involvement implications, transmission vectors, and the implementation of successful surveillance strategies. Objectives: This review seeks to highlight current and historical outbreak trends, transmission and ocular tropism significance, and strategies to mitigate viral spread. Methods: A comprehensive narrative literature review was completed using PubMed database as well as local, federal, and international public health press releases. Discussion: The 2024 US outbreak of H5N1 demonstrates the unique adaptability of the virus. Traditionally transmitted to humans via infected poultry, this outbreak marks the first confirmed case of dairy cow-transmitted human infection. Unlike many past H5N1outbreaks, the majority of patients in the current US outbreak have presented with conjunctivitis either alone or alongside systemic symptoms. This ocular-specific disease manifestation offers new clinical and screening implications. Awareness of ophthalmic involvement among physicians and public health organizations can help guide screening candidates and identify potential infections.

Keywords

Influenza A Virus, H5N1 Subtype, Influenza in Birds, Influenza, Human, Humans, Animals, Review, United States, Poultry, Disease Outbreaks

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green
gold