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3. Fish consumption habits of pregnant women in Itaituba, Tapajós River basin, Brazil: risks of mercury contamination as assessed by measuring total mercury in highly consumed piscivore fish species and in hair of pregnant women

Author

Oliveira Ricardo Bezerra de, Silva Domingas Machado da, Franco Thamilles Santa Bárbara Sousa, Vasconcelos Cláudio Ramon Sena, Sousa Deise Juliane dos Anjos de, Sarrazin Sandra Layse Ferreira, Sakamoto Mineshi, and Bourdineaud Jean-Paul

Subjects
cichla spp., hair, methylmercury, plagioscion squamosissimus, metil-živa, ukupna živa, Toxicology. Poisons, RA1190-1270
Abstract

The Tapajós River basin in the Amazon region, Brazil is one of the most active gold mining areas in the world. In this study, we evaluated fish consumption habits and mercury exposure in 110 pregnant women in the city of Itaituba by measuring their total hair mercury concentrations. In addition, we investigated seasonal differences in mercury concentrations in two highly consumed piscivorous fish species, tucunaré (Cichla spp.) and pescada (Plagioscion squamosissimus). Total fish mercury concentrations (THg) during the dry season were 0.62±0.07 mg/kg for Cichla spp. and 0.73±0.08 mg/kg for P. squamosissimus. During the rainy season they were 0.39±0.04 and 0.84±0.08 mg/ kg, respectively. Of our participants 44 % declared that they ate Cichla spp. and 67 % P. squamosissimus. Mean mercury concentration in their hair was 1.6±0.2 mg/kg and was above the US Environmental Protection Agency (US EPA) reference dose of 1 mg/kg in 48 % of them. Mean fish THg concentrations were also above the joint Food and Drug Administration and US EPA safety limit of 0.5 mg/kg for P. squamosissimus during both seasons and for Cichla spp. during the dry season only. These results show that pregnant women should avoid consumption of these piscivorous fish species during pregnancy and call for a regular programme to monitor Hg levels in that area.

Published
2022
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10. Development of Human Hair Reference Material Supporting the Biomonitoring of Methylmercury

Author

Haraguchi, Koichi, Sakamoto, Mineshi, Matsuyama, Akito, Yamamoto, Megumi, Hung, Dang T., Nagasaka, Hiromitsu, Uchida, Keisuke, Ito, Yasunori, Kodamatani, Hitoshi, Horvat, Milena, Chan, Hing M., Rand, Matthew, Cirtiu, Ciprian M., Kim, Byoung-Gwon, Nielsen, Flemming, Yamakawa, Akane, Mashyanov, Nikolay, Panichev, Nikolai, Panova, Elena, Watanabe, Tomoaki, Kaneko, Naoki, Yoshinaga, Jun, Herwati, Ranny F., Suoth, Alfrida E., and Akagi, Hirokatsu

Published
2020
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19. Neurodevelopmental Effects of Prenatal and Postnatal Methylmercury Exposure Among Children in the First Grade in Kinan Region, Japan

Author

Nakamura, Masaaki, primary, Tatsuta, Nozomi, additional, Murata, Katsuyuki, additional, Nakai, Kunihiko, additional, Iwata, Toyoto, additional, Otobe, Takayuki, additional, Sakamoto, Mineshi, additional, Yamamoto, Megumi, additional, Itatani, Mina, additional, Miura, Yoko, additional, and Koriyama, Chihaya, additional

Published
2023
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25. Fish consumption habits of pregnant women in Itaituba, Tapajós River basin, Brazil: risks of mercury contamination as assessed by measuring total mercury in highly consumed piscivore fish species and in hair of pregnant women

Author

de Oliveira, Ricardo Bezerra, da Silva, Domingas Machado, Sousa Franco, Thamilles Santa Bárbara, Sena Vasconcelos, Cláudio Ramon, dos Anjos de Sousa, Deise Juliane, Ferreira Sarrazin, Sandra Layse, Sakamoto, Mineshi, Bourdineaud, Jean-Paul, de Oliveira, Ricardo Bezerra, da Silva, Domingas Machado, Sousa Franco, Thamilles Santa Bárbara, Sena Vasconcelos, Cláudio Ramon, dos Anjos de Sousa, Deise Juliane, Ferreira Sarrazin, Sandra Layse, Sakamoto, Mineshi, and Bourdineaud, Jean-Paul

Abstract

The Tapajós River basin in the Amazon region, Brazil is one of the most active gold mining areas in the world. In this study, we evaluated fish consumption habits and mercury exposure in 110 pregnant women in the city of Itaituba by measuring their total hair mercury concentrations. In addition, we investigated seasonal differences in mercury concentrations in two highly consumed piscivorous fish species, tucunaré (Cichla spp.) and pescada (Plagioscion squamosissimus). Total fish mercury concentrations (THg) during the dry season were 0.62±0.07 mg/kg for Cichla spp. and 0.73±0.08 mg/kg for P. squamosissimus. During the rainy season they were 0.39±0.04 and 0.84±0.08 mg/kg, respectively. Of our participants 44 % declared that they ate Cichla spp. and 67 % P. squamosissimus. Mean mercury concentration in their hair was 1.6±0.2 mg/kg and was above the US Environmental Protection Agency (US EPA) reference dose of 1 mg/kg in 48 % of them. Mean fish THg concentrations were also above the joint Food and Drug Administration and US EPA safety limit of 0.5 mg/kg for P. squamosissimus during both seasons and for Cichla spp. during the dry season only. These results show that pregnant women should avoid consumption of these piscivorous fish species during pregnancy and call for a regular programme to monitor Hg levels in that area., Slijev rijeke Tapajós u amazonskom području u Brazilu jedno je od najaktivnijih područja iskopavanja zlata na svijetu. U ovoj smo studiji procijenili navike konzumiranja ribe i razinu izloženosti metil-živi u 110 stanovnica Itaitube u peripartumu mjerenjem ukupne koncentracije žive u kosi (THg). Osim toga, istražili smo sezonske razlike u koncentracijama žive u dvjema najčešćim vrstama konzumnih piscivornih riba: tucunaré (Cichla spp.) i pescada (Plagioscion squamosissimus). U tih je ribljih vrsta THg tijekom sušne sezone iznosio 0,62±0,07 mg/kg za Cichla spp. te 0,73±0,08 mg/kg za P. squamosissimus. Tijekom kišne sezone koncentracija THg bila je 0,39±0,04 mg/kg za Cichla spp. I 0,84±0,08 mg/kg za P. squamosissimus. Sudionice su izjavile da su konzumirale Cichla spp. (44 %) i P. squamosissimus (67 %). Srednja koncentracija THg izmjerena u kosi bila je 1,6±0,2 mg/kg±std. Prosječna koncentracija THg u kosi bila je viša od referentne doze Američke agencije za zaštitu okoliša (krat. US EPA) koja iznosi 1 mg/kg, a čak u 48 % sudionica izmjerena je viša koncentracija. Također, srednja vrijednost koncentracija THg u ribi bila je iznad sigurnosne granice (0,5 mg/kg) za P. squamosissimus i tijekom sušne i kišne sezone, a za Cichla spp. samo tijekom sušne sezone. Rezultati istraživanja pokazuju da bi trudnice trebale izbjegavati konzumaciju ovih piscivornih ribljih vrsta. Stoga je razvidna potreba za redovitim programom praćenja razine žive na tom području.

Published
2022

26. Mercury exposure in female artisanal small-scale gold miners (ASGM) in Mongolia: An analysis of human biomonitoring (HBM) data from 2008

Author

Steckling, Nadine, Boese-O'Reilly, Stephan, Gradel, Cornelia, Gutschmidt, Kersten, Shinee, Enkhtsetseg, Altangerel, Enkhjargal, Badrakh, Burmaa, Bonduush, Ichinkhorloo, Surenjav, Unursaikhan, Ferstl, Philip, Roider, Gabriele, Sakamoto, Mineshi, Sepai, Ovnair, Drasch, Gustav, Lettmeier, Beate, Morton, Jackie, Jones, Kate, Siebert, Uwe, and Hornberg, Claudia

Published
2011
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27. Fish consumption habits of pregnant women in Itaituba, Tapajós River basin, Brazil: risks of mercury contamination as assessed by measuring total mercury in highly consumed piscivore fish species and in hair of pregnant women

Author

Oliveira, Ricardo Bezerra de, primary, Silva, Domingas Machado da, additional, Franco, Thamilles Santa Bárbara Sousa, additional, Vasconcelos, Cláudio Ramon Sena, additional, Sousa, Deise Juliane dos Anjos de, additional, Sarrazin, Sandra Layse Ferreira, additional, Sakamoto, Mineshi, additional, and Bourdineaud, Jean-Paul, additional

Published
2022
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36. Assessment of Cardiac Autonomic Function in Relation to Methylmercury Neurotoxicity

Author

Karita, Kanae, Iwata, Toyoto, Maeda, Eri, Sakamoto, Mineshi, Murata, Katsuyuki, Karita, Kanae, Iwata, Toyoto, Maeda, Eri, Sakamoto, Mineshi, and Murata, Katsuyuki

Abstract

After the European Food Safety Authority reviewed reports of methylmercury and heart rate variability (HRV) in 2012, the panel concluded that, although some studies of cardiac autonomy suggested an autonomic effect of methylmercury, the results were inconsistent among studies and the implications for health were unclear. In this study, we reconsider this association by adding a perspective on the physiological context. Cardiovascular rhythmicity is usually studied within different frequency domains of HRV. Three spectral components are usually detected; in humans these are centered at <0.04 Hz, 0.15 Hz (LF), and 0.3 Hz (HF). LF and HF (sympathetic and parasympathetic activities, respectively) are evaluated in terms of frequency and power. By searching PubMed, we identified 13 studies examining the effect of methylmercury exposure on HRV in human populations in the Faroe Islands, the Seychelles and other countries. Considering both reduced HRV and sympathodominant state (i.e., lower HF, higher LF, or higher LF/HF ratio) as autonomic abnormality, eight of them showed the significant association with methylmercury exposure. Five studies failed to demonstrate any significant association. In conclusion, these data suggest that increased methylmercury exposure was consistently associated with autonomic abnormality, though the influence of methylmercury on HRV (e.g., LF) might differ for prenatal and postnatal exposures. The results with HRV should be included in the risk characterization of methylmercury. The HRV parameters calculated by frequency domain analysis appear to be more sensitive to methylmercury exposure than those by time domain analysis.

Published
2021

38. Methylmercury exposure and health effects in humans: A worldwide concern

Author

Mergler, Donna, Anderson, Hency A., Chan, Laurie Hing Man, Mahaffey, Kathryn R., Murray, Michael, Sakamoto, Mineshi, and Stern, Alan H.

Subjects
Methylmercury -- Environmental aspects, Hazardous substances -- Risk assessment, Environmental issues
Abstract

A study to identify unresolved issues about Methylmercury (MeHg) exposure, health effects and risk assessment was conducted. The results showed that the levels of exposure to MeHg have the potential to result in an elevated risk of cardiovascular disease to a significant fraction of the population.

Published
2007

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