Cross-sectional study to assess the association of color vision with mercury hair concentration in children from Brazilian Amazonian riverine communities

Freitas, Joyce dos Santos; Lacerda, Eliza Maria da Costa Brito; Martins, Isabelle Christine Vieira da Silva; Rodrigues, Diego de Macedo; Bonci, Daniela Maria Oliveira; Côrtes, Maria Izabel Tentes; Corvelo, Tereza Cristina de Oliveira; Ventura, Dora Fix; Silveira, Luiz Carlos de Lima; Pinheiro, Maria da Conceição Nascimento; Souza, Givago da Silva

doi:10.1016/j.neuro.2018.02.006

Cited by 19 publications

(14 citation statements)

References 52 publications

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“…Previously, other investigations have shown color vision loss in fish consuming riverine populations (Rodrigues et al, 2007;Dos Santos Freitas et al, 2018;Feitosa-Santana et al, 2018) in the Amazon region. Most of them have used hue ordering tests to evaluate the color vision of the exposure subjects (Dos Santos Freitas et al, 2018;Feitosa-Santana et al, 2018). We confirmed the previous findings showing that color vision is altered in subjects with no history of mercury vapor exposure, but have fish as their main source of proteins.…”

Section: Discussionmentioning

confidence: 89%

“…Mercury has a cataractogenic potential because it can induce aggregation of human lens proteins (Domínguez-Calva et al, 2018), electroretinographic and cortical recordings in mercury exposed humans suggest impairment of the retinal and cortical activity (Ventura et al, 2004(Ventura et al, , 2005Saldana et al, 2006;da Costa et al, 2008;Yorifuji et al, 2013). The influence of mercury in the visual perception has been investigated by many psychophysical tests for hue ordering test, chromatic discrimination, visual acuity, and visual field sensitivity (Cavalleri et al, 1995;Cavalleri and Gobba, 1998;Rodrigues et al, 2007;Fillion et al, 2011Fillion et al, , 2013Dos Santos Freitas et al, 2018;Feitosa-Santana et al, 2018). Other investigations evaluated the visual field of subjects exposed to mercury vapor (Barboni et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

“…Other studies have examined fish or seafood consumers to detect visual sequels associated with environmental exposure to mercury. Specifically, in the Brazilian Amazon region, most of the investigation has been done in riverside populations dependent on fishery (Lebel et al, 1996(Lebel et al, , 1998Rodrigues et al, 2007;Lacerda, 1997;Passos and Mergler, 2008;Fillion et al, 2011Fillion et al, , 2013Dos Santos Freitas et al, 2018;Feitosa-Santana et al, 2018). The literature describes that mercury exposure is associated with several visual impairments -decreased color vision, reduced contrast sensitivity, visual field constriction (Lebel et al, 1996(Lebel et al, , 1998Rodrigues et al, 2007;Fillion et al, 2011Fillion et al, , 2013.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Visual Functions of Two Amazonian Populations: Possible Consequences of Different Mercury Exposure

et al. 2020

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The present study investigated the visual perimetry and color vision of two Amazonian populations differently exposed to mercury. Ten riverines environmentally exposed to mercury by fish eating and 34 gold-miners occupationally exposed to mercury vapor. The visual perimetry was estimated using the Förster perimeter and the color vision was evaluated using a computerized version of Farnsworth-Munsell test. Riverine and gold-miners' hair mercury concentrations were quantified. Mercury hair concentration of the riverines was significantly higher than that from gold-miners. Riverines had lower perimetric area than the gold-miners. The errors in the hue ordering test of both Amazonian populations were larger than the controls (non-exposed subjects), but there was no difference between themselves. Riverines had significant multiple association between the visual function and hair mercury concentration, while the gold-miners has no significant association with the exposure. We concluded that the different ways of mercury exposure led to similar visual outcomes, with greater impairment in riverines (organic mercury exposed subjects).

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of Visual Functions of Two Amazonian Populations: Possible Consequences of Different Mercury Exposure

et al. 2020

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“…Moreover, the impact of gold mining on human mercury exposure has been evaluated in several cross-sectional studies involving control groups (i.e., populations living in areas with no history of mining activity) [16][17][18][19][20]. These studies reveal that the mercury levels detected in hair samples collected from groups living in areas impacted by mining are considerably higher than the levels observed in control groups.…”

Section: Introductionmentioning

confidence: 99%

Mercury Exposure in Munduruku Indigenous Communities from Brazilian Amazon: Methodological Background and an Overview of the Principal Results

Basta

Viana

Vasconcellos

et al. 2021

IJERPH

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The Amazonian indigenous peoples depend on natural resources to live, but human activities’ growing impacts threaten their health and livelihoods. Our objectives were to present the principal results of an integrated and multidisciplinary analysis of the health parameters and assess the mercury (Hg) exposure levels in indigenous populations in the Brazilian Amazon. We carried out a cross-sectional study based on a census of three Munduruku indigenous villages (Sawré Muybu, Poxo Muybu, and Sawré Aboy), located in the Sawré Muybu Indigenous Land, between 29 October and 9 November 2019. The investigation included: (i) sociodemographic characterization of the participants; (ii) health assessment; (iii) genetic polymorphism analysis; (iv) hair mercury determination; and (v) fish mercury determination. We used the logistic regression model with conditional Prevalence Ratio (PR), with the respective 95% confidence intervals (CI95%) to explore factors associated with mercury exposure levels ≥6.0 µg/g. A total of 200 participants were interviewed. Mercury levels (197 hair samples) ranged from 1.4 to 23.9 μg/g, with significant differences between the villages (Kruskal–Wallis test: 19.9; p-value < 0.001). On average, the general prevalence of Hg exposure ≥ 6.0 µg/g was 57.9%. For participants ≥12 years old, the Hg exposure ≥6.0 µg/g showed associated with no regular income (PR: 1.3; CI95%: 1.0–1.8), high blood pressure (PR: 1.6; CI95%: 1.3–2.1) and was more prominent in Sawré Aboy village (PR: 1.8; CI95%: 1.3–2.3). For women of childbearing age, the Hg exposure ≥6.0 µg/g was associated with high blood pressure (PR: 1.9; CI95%: 1.2–2.3), with pregnancy (PR: 1.5; CI95%: 1.0–2.1) and was more prominent among residents in Poxo Muybu (PR: 1.9; CI95%: 1.0–3.4) and Sawré Aboy (PR: 2.5; CI95%: 1.4–4.4) villages. Our findings suggest that chronic mercury exposure causes harmful effects to the studied indigenous communities, especially considering vulnerable groups of the population, such as women of childbearing age. Lastly, we propose to stop the illegal mining in these areas and develop a risk management plan that aims to ensure the health, livelihoods, and human rights of the indigenous people from Amazon Basin.

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“…Mercury (Hg) in the Amazon region has been recognized since the 1980s, when gold mining had its activities intensified (1)(2) . Several studies (3)(4) also point out that disordered use and occupation of Amazonian soil, in addition to deforestation and fires, has contributed to the release of Hg to aquatic ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Prevalence and factors associated with mercury exposure in riverside communities in the Brazilian Western Amazon

et al. 2020

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Objective: to verify mercury exposure prevalence and identify its possible associated factors in two riverside communities in the Madeira River basin of the Western Brazilian Amazon. Method: a cross-sectional study comprising 95 children and adolescents. Age cycle, school attendance, Bolsa Família, number of siblings, meals, fish consumption, height by age were measured. Binary logistic regression was used to verify relationships between mercury exposure and its possible associated factors. Results: the general prevalence of mercury exposure was 46.3%; children, 35.4%; and adolescents, 57.4%. Associated factors were fish consumption (aOR=1.84; 95%CI 1.56-2.16), age cycle (aOR=2.50; 95%CI 1.09-5.7), parasites (aOR=1.22; 95%CI 1.02-2.71), and short stature (aOR=1.32; 95%CI 1.05-2.02). Conclusion: mercury exposure prevalence in riverside children and adolescents was considered worrying, with association with fish consumption, adolescence, parasites, and short stature.

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Cross-sectional study to assess the association of color vision with mercury hair concentration in children from Brazilian Amazonian riverine communities

Cited by 19 publications

References 52 publications

Comparison of Visual Functions of Two Amazonian Populations: Possible Consequences of Different Mercury Exposure

Comparison of Visual Functions of Two Amazonian Populations: Possible Consequences of Different Mercury Exposure

Mercury Exposure in Munduruku Indigenous Communities from Brazilian Amazon: Methodological Background and an Overview of the Principal Results

Prevalence and factors associated with mercury exposure in riverside communities in the Brazilian Western Amazon

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