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http://hdl.handle.net/1843/41738| Type: | Artigo de Periódico |
| Title: | Total mercury in commercial fishes and estimation of Brazilian dietary exposure to methylmercury |
| Authors: | Flávia Beatriz Custódio Arthur Magno Guedes Franco de Andrade Leticia Rocha Guidi Carlos Augusto Gomes Leal Maria Beatriz de Abreu Glória |
| Abstract: | Background Mercury, in particular its most toxic form methylmercury, poses a risk to public health. Dietary methylmercury exposure is mainly by fish, and it can vary with fish contamination and by dietary habits of the population. This study aimed to quantify total mercury levels in different fish from Brazil and to estimate Brazilian exposure to methylmercury by fish consumption. Methods Total mercury occurrence was investigated in 18 different fish species by atomic absorption spectrometry with thermal decomposition and gold amalgamation. Dietary exposure to methylmercury was estimated by a deterministic method for different groups considering consumption by sex, different Brazilian geographical regions and habitat (rural or urban). Results Carnivorous fish showed higher levels of mercury (0.01 to 0.93 mg/kg) compared to non-strictly carnivorous fish (<0.01 to 0.30 mg/kg). Farmed fishes showed significantly lower levels compared to wild fish. Mean Brazilian fish consumption achieves FAO/WHO health recommendation of about two portions of fish per week. However, there is a large difference between fish consumption at urban and rural homes and among Brazilian geographic regions. These differences in consumption impacted estimated methylmercury intake that was higher in the Northern (1.85 μg/kg bw week) and in the Northeastern (0.72 μg/kg bw week) regions and also by rural population (1.08 μg/kg bw week). These values were compared with the toxicological reference dose for neurotoxicity of 1.6 μg/kg bw week. Conclusion Even though total levels of mercury in fish were lower than Brazilian and international legislations, in the Northern Brazilian region methylmercury intake overpassed the toxicological reference dose for neurotoxicity and in rural areas it achieved 68% of this reference dose. |
| Subject: | Metais pesados Peixes Segurança alimentar |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | FAR - DEPARTAMENTO DE ALIMENTOS FAR - DEPARTAMENTO DE PRODUTOS FARMACÊUTICOS VET - DEPARTAMENTO DE MEDICINA VETERINÁRIA PREVENTIVA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | 10.1016/j.jtemb.2020.126641 |
| URI: | http://hdl.handle.net/1843/41738 |
| Issue Date: | Dec-2020 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S0946672X20302066?via%3Dihub |
| metadata.dc.relation.ispartof: | Journal of Trace Elements in Medicine and Biology |
| Appears in Collections: | Artigo de Periódico |
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