Evidence of SARS-CoV-2 Transmission Through the Ocular Route.
ACE2
COVID-19
SARS-CoV-2
TMPRSS2
conjunctivitis
ocular transmission
Journal
Clinical ophthalmology (Auckland, N.Z.)
ISSN: 1177-5467
Titre abrégé: Clin Ophthalmol
Pays: New Zealand
ID NLM: 101321512
Informations de publication
Date de publication:
2021
2021
Historique:
received:
02
12
2020
accepted:
13
01
2021
entrez:
4
3
2021
pubmed:
5
3
2021
medline:
5
3
2021
Statut:
epublish
Résumé
Currently, the coronavirus disease 2019 (COVID-19) pandemic is raging around the world. However, the transmission of its pathogen, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is not fully clear. It is still controversial whether the ocular transmission of SARS-CoV-2 exists. This review aimed to summarize the evidence of SARS-CoV-2 ocular transmission. Online articles were searched till October 23, 2020 in Pubmed, Embase, and websites of World Health Organization, Centers for Disease Control and Prevention COVID-19, American Academy of Ophthalmology, and American Society of Cataract and Refractive Surgery under the search strategy of (((("COVID-19"[Mesh]) OR ("SARS-CoV-2"[Mesh])) OR (2019 novel coronavirus)) OR (2019-nCoV)) AND (((("Conjunctivitis"[Mesh]) OR (Ocular Surface)) OR ("Eye"[Mesh])) OR ("Ophthalmology"[Mesh])). The language was not restricted. After screening, 1445 records were excluded and 168 references original articles were finally included. Cells of ocular surface express both the receptor of angiotensin-converting enzyme 2 (ACE2) and transmembrane serine protease 2 (TMPRSS2), offering molecular bases for the ocular susceptibility to SARS-CoV-2. Accumulated COVID-19 patients presented conjunctivitis as the initial or the only symptom. Whether COVID-19 patients had ocular symptoms or not, SARS-CoV-2 was detectable on the ocular surface, and the isolated virus was infectious, proving that the ocular surface can not only be a reservoir but also a source of contagion. SARS-CoV-2 may reach the ocular surface by hand-eye contact and aerosols. Once SARS-CoV-2 reaches the ocular surface, it may transfer to other systems through the nasolacrimal system or hematogenous metastasis. The ocular surface can serve as a reservoir and source of contagion for SARS-CoV-2. SARS-CoV-2 can be transmitted to the ocular surface through hand-eye contact and aerosols, and then transfer to other systems through nasolacrimal route and hematogenous metastasis. The possibility of ocular transmission of SARS-CoV-2 cannot be ignored.
Identifiants
pubmed: 33658750
doi: 10.2147/OPTH.S295283
pii: 295283
pmc: PMC7920625
doi:
Types de publication
Journal Article
Review
Langues
eng
Pagination
687-696Informations de copyright
© 2021 Qu et al.
Déclaration de conflit d'intérêts
The authors have no conflicts of interest to declare for this work.
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