Sunlight Inactivation of Enveloped Viruses in Clear Water.
Environ Sci Technol
; 57(50): 21395-21404, 2023 Dec 19.
Article
em En
| MEDLINE
| ID: mdl-38062652
ABSTRACT
Enveloped virus fate in the environment is not well understood; there are no quantitative data on sunlight inactivation of enveloped viruses in water. Herein, we measured the sunlight inactivation of two enveloped viruses (Phi6 and murine hepatitis virus, MHV) and a nonenveloped virus (MS2) over time in clear water with simulated sunlight exposure. We attenuated UV sunlight wavelengths using long-pass 50% cutoff filters at 280, 305, and 320 nm. With the lowest UV attenuation tested, all decay rate constants (corrected for UV light screening, kÌ) were significantly different from dark controls; the MS2 kÌ was equal to 4.5 m2/MJ, compared to 16 m2/MJ for Phi6 and 52 m2/MJ for MHV. With the highest UV attenuation tested, only kÌ for MHV (6.1 m2/MJ) was different from the dark control. Results indicate that the two enveloped viruses decay faster than the nonenveloped virus studied, and kÌ are significantly impacted by UV attenuation. Differences in kÌ may be due to the presence of viral envelopes but may also be related to other differing intrinsic properties of the viruses, including genome length and composition. Reported kÌ values can inform strategies to reduce the risk from exposure to enveloped viruses in the environment.
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MEDLINE
Assunto principal:
Vírus
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Água
Limite:
Animals
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article