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Title: Effects of chronic low-dose radiation on cataract prevalence and characterization in wild boar (Sus scrofa) from Fukushima, Japan

Abstract

This study evaluated cataracts in wild boar exposed to chronic low-dose radiation. We examined wild boar from within and outside the Fukushima Exclusion Zone for nuclear, cortical, and posterior subcapsular (PSC) cataracts in vivo and photographically. Plausible upper-bound, lifetime radiation dose for each boar was estimated from radioactivity levels in each animal’s home range combined with tissue concentrations of 134+137Cesium. Fifteen exposed and twenty control boar were evaluated. There were no significant differences in overall prevalence or score for cortical or PSC cataracts between exposed and control animals. Nuclear (centrally located) cataracts were significantly more prevalent in exposed boar (p<0.05) and had statistically higher median scores. Plausible upper-bound, lifetime radiation dose ranged from 1 to 1,600 mGy in exposed animals, with no correlation between dose and cortical or PSC score. While radiation dose and nuclear score were positively associated, the impact of age could not be completely separated from the relationship. Additionally, the clinical significance of even the highest scoring nuclear cataract was negligible. Based on the population sampled, wild boar in the Fukushima Exclusion Zone do not have a significantly higher prevalence or risk of cortical or PSC cataracts compared to control animals.

Authors:
 [1];  [1];  [2];  [3];  [4]; ORCiD logo [5];  [6];  [3];  [2];  [1]
  1. Colorado State Univ., Fort Collins, CO (United States). College of Veterinary Medicine and Biomedical Sciences. Clinical Sciences
  2. Colorado State Univ., Fort Collins, CO (United States). College of Veterinary Medicine and Biomedical Sciences. Environmental Radiological and Health Sciences
  3. Fukushima Univ. (Japan). Inst. of Environmental Radioactivity
  4. Insight Veterinary Specialty Pathology, Davis, CA (United States)
  5. Savannah River Site (SRS), Aiken, SC (United States). Savannah River Ecology Lab. (SREL). Warnell School of Forestry and Natural Resources
  6. Colorado State Univ., Fort Collins, CO (United States). College of Veterinary Medicine and Biomedical Sciences. Biomedical Sciences
Publication Date:
Research Org.:
Savannah River Ecology Laboratory (SREL), Aiken, SC (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
OSTI Identifier:
1629983
Grant/Contract Number:  
EM0004391
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; 59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Pederson, Samantha L., Li Puma, Margaret C., Hayes, Joshua M., Okuda, Kei, Reilly, Christopher M., Beasley, James C., Li Puma, Lance C., Hinton, Thomas G., Johnson, Thomas E., and Freeman, Kate S. Effects of chronic low-dose radiation on cataract prevalence and characterization in wild boar (Sus scrofa) from Fukushima, Japan. United States: N. p., 2020. Web. doi:10.1038/s41598-020-59734-5.
Pederson, Samantha L., Li Puma, Margaret C., Hayes, Joshua M., Okuda, Kei, Reilly, Christopher M., Beasley, James C., Li Puma, Lance C., Hinton, Thomas G., Johnson, Thomas E., & Freeman, Kate S. Effects of chronic low-dose radiation on cataract prevalence and characterization in wild boar (Sus scrofa) from Fukushima, Japan. United States. https://doi.org/10.1038/s41598-020-59734-5
Pederson, Samantha L., Li Puma, Margaret C., Hayes, Joshua M., Okuda, Kei, Reilly, Christopher M., Beasley, James C., Li Puma, Lance C., Hinton, Thomas G., Johnson, Thomas E., and Freeman, Kate S. Wed . "Effects of chronic low-dose radiation on cataract prevalence and characterization in wild boar (Sus scrofa) from Fukushima, Japan". United States. https://doi.org/10.1038/s41598-020-59734-5. https://www.osti.gov/servlets/purl/1629983.
@article{osti_1629983,
title = {Effects of chronic low-dose radiation on cataract prevalence and characterization in wild boar (Sus scrofa) from Fukushima, Japan},
author = {Pederson, Samantha L. and Li Puma, Margaret C. and Hayes, Joshua M. and Okuda, Kei and Reilly, Christopher M. and Beasley, James C. and Li Puma, Lance C. and Hinton, Thomas G. and Johnson, Thomas E. and Freeman, Kate S.},
abstractNote = {This study evaluated cataracts in wild boar exposed to chronic low-dose radiation. We examined wild boar from within and outside the Fukushima Exclusion Zone for nuclear, cortical, and posterior subcapsular (PSC) cataracts in vivo and photographically. Plausible upper-bound, lifetime radiation dose for each boar was estimated from radioactivity levels in each animal’s home range combined with tissue concentrations of 134+137Cesium. Fifteen exposed and twenty control boar were evaluated. There were no significant differences in overall prevalence or score for cortical or PSC cataracts between exposed and control animals. Nuclear (centrally located) cataracts were significantly more prevalent in exposed boar (p<0.05) and had statistically higher median scores. Plausible upper-bound, lifetime radiation dose ranged from 1 to 1,600 mGy in exposed animals, with no correlation between dose and cortical or PSC score. While radiation dose and nuclear score were positively associated, the impact of age could not be completely separated from the relationship. Additionally, the clinical significance of even the highest scoring nuclear cataract was negligible. Based on the population sampled, wild boar in the Fukushima Exclusion Zone do not have a significantly higher prevalence or risk of cortical or PSC cataracts compared to control animals.},
doi = {10.1038/s41598-020-59734-5},
journal = {Scientific Reports},
number = 1,
volume = 10,
place = {United States},
year = {Wed Mar 04 00:00:00 EST 2020},
month = {Wed Mar 04 00:00:00 EST 2020}
}

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