Microplastics exacerbate virus-mediated mortality in fish

Seeley, M.E.; Hale, R.C.; Zwollo, P.; Vogelbein, W.; Verry, G.; Wargo, A.R.

doi:10.1016/j.scitotenv.2022.161191

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Microplastics exacerbate virus-mediated mortality in fish

2023
By Seeley, M.E. ; Hale, R.C. ; Zwollo, P. ; ...
Source: Science of the Total Environment 866 (2023) 161191

[PDF-1.01 MB]

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Journal Title:

Science of The Total Environment
Personal Author:

Seeley, M.E. ; Hale, R.C. ; Zwollo, P. ; Vogelbein, W. ; Verry, G. ; ... More +

Seeley, M.E. ; Hale, R.C. ; Zwollo, P. ; Vogelbein, W. ; Verry, G. ; Wargo, A.R. Less -
NOAA Program & Office:

NOS (National Ocean Service)
Description:

Microplastics are a persistent and increasing environmental hazard. They have been reported to interact with a variety of biotic and abiotic environmental stressors, but the ramifications of such interactions are largely unknown. We investigated virus-induced mortalities in a commercially important salmonid following exposure to microplastics, plastic microfibers, and natural (non-plastic) microparticles. Microplastics or microparticles alone were not lethal. Mortality increased significantly when fish were co-exposed to virus and microplastics, particularly microfibers, compared to virus alone. This presents the unique finding that microplastics (not natural microparticulate matter) may have a significant impact on population health when presented with another stressor. Further, we found that mortality correlated with host viral load, mild gill inflammation, immune responses, and transmission potential. We hypothesize that microplastics can compromise host tissues, allowing pathogens to bypass defenses. Further research regarding this mechanism and the interplay between microplastics and infectious disease are paramount, considering microplastics increasing environmental burden.
Keywords:

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Animals—Mortality Aquaculture Infectious Hematopoietic Necrosis Virus Microplastics Rainbow Trout Salmonidae Viruses Co-stressor IHNV Microfiber Oncorhynchus Mykiss Salmonids
Source:

Science of the Total Environment 866 (2023) 161191
DOI:

https://doi.org/10.1016/j.scitotenv.2022.161191
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PDF
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Journal Article
Funding:

Grant no. NA19NOS9990085
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Accepted Manuscript
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Submitted
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urn:sha256:9ca6baa0bc77519b48620fde901e1398ebc9605497747589c04c7b39f8a25331
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https://repository.library.noaa.gov/view/noaa/56121/noaa_56121_DS1.pdf
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