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Effect of the Fukushima nuclear power plant accident on radioiodine (131I) content in human breast milk

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Title: Effect of the Fukushima nuclear power plant accident on radioiodine (131I) content in human breast milk
Authors: Unno, Nobuya Browse this author
Minakami, Hisanori Browse this author →KAKEN DB
Kubo, Takahiko Browse this author
Fujimori, Keiya Browse this author
Ishiwata, Isamu Browse this author
Terada, Hiroshi Browse this author
Saito, Shigeru Browse this author
Yamaguchi, Ichiro Browse this author
Kunugita, Naoki Browse this author
Nakai, Akihito Browse this author
Yoshimura, Yasunori Browse this author
Keywords: human breast milk
nuclear power plant accident
Issue Date: May-2012
Publisher: Blackwell Publishing
Journal Title: Journal of Obstetrics and Gynaecology Research
Volume: 38
Issue: 5
Start Page: 772
End Page: 779
Publisher DOI: 10.1111/j.1447-0756.2011.01810.x
Abstract: Background: Environmental pollution with radioiodine occurred after an accident at the Fukushima nuclear power plant (FNP) on March 11, 2011, in Japan. Whether environmental pollution with 131I can contaminate human breast milk has not been documented. Methods: 131I content was determined in 126 breast milk samples from 119 volunteer lactating women residing within 250 km of the FNP, between April 24 and May 31, 2011. The degree of environmental pollution was determined based on the data released by the Japanese government. Results: An 131I content (becquerels per kilogram, Bq/kg) of 210 in the tap water in Tokyo, which is located 230 km south of the FNP, on March 22 and of 3,500 in spinach sampled in a city located 140 km southwest of the FNP on March 19 decreased over time to < 21 on March 27 and 12 on April 26, respectively. Seven of 23 women who were tested in April secreted a detectable level of 131I in their breast milk. The concentrations of 131I (Bq/kg) in the breast milk of the 7 women were 2.3 (on month/day, 4/24), and 2.2, 2.3, 2.3, 3.0, 3.5 and 8.0 (4/25); the concentrations of 131I in the tap water available for these 7 women at the same time points were estimated to be <1.3. None of the remaining 96 women tested in May exhibited a detectable 131I in their breast milk samples. Conclusions: The contamination of breast milk with 131I can occur even when only mild environmental 131I pollution is present.
Rights: The definitive version is available at Wiley Online Library,
Type: article (author version)
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 水上 尚典

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