Mercury toxicity in Amazon gold miners: visual dysfunction assessed by (2008)
- Autores:
- Costa, Genilma M da
- Anjos, Laiza M dos - Universidade Federal do Pará (UFPA)
- Souza, Givago S - Universidade Federal do Pará (UFPA)
- Gomes, Bruno D - Universidade Federal do Pará (UFPA)
- Saito, Cézar A - Universidade Federal do Pará (UFPA)
- Pinheiro, Maria da Conceição N - Universidade Federal do Pará (UFPA)
- Ventura, Dora Selma Fix
- Silva Filho, Manoel da - Universidade Federal do Pará (UFPA)
- Silveira, Luiz Carlos L - Universidade Federal do Pará (UFPA)
- Autor USP: VENTURA, DORA SELMA FIX - IP
- Unidade: IP
- Assuntos: MERCÚRIO (ELEMENTO QUÍMICO); CONTRASTE; EXPOSIÇÃO OCUPACIONAL; MINERAIS COM RISCO À SAÚDE; MINERAÇÃO; AMAZONAS
- Idioma: Inglês
- Resumo: Amazonian gold mining activity results in human exposure to mercury vapor. We evaluated the visual system of two Amazonian gold miners (29 and 37 years old) by recording the transient pattern electroretinogram (tPERG) and transient pattern visual evoked potential (tPVEP). We compared these result whit tose obtained from a regional group of control subjects. For both tPERG and tPVEP, chekerboards with 0.5 or 2 cycles per degree (cpd) of spatial frequency were presented in a 161 squared area, 100% Michelson contrast, 50 cd/m2 mean luminance, and 1Hz square-wave pattern-reversal presentation. Two averaged waveforms (n ¼ 240 sweeps, 1 s each) were monocularly obtained for each subject in each condition. Both eyes were monocularly tested only in gold miners. Normative data were calculated using a final pooled waveform with 480 sweeps. The first gold miner, LCS, had normal tPERG responses. The second one, RNP, showed low tPERG (P50 component) amplitudes at 0.5 cpd for both eyes, outside the normative data, and absence of response at 2 cpd for his right eye. Delayed tPVEP responses (P100 component) were found at 2 cpd for LCS but the implicit times were inside the normative data. Subject RNP also showed delayed tPVEP responses (all components), but only the implicit time obtained with his right eye was outside the normative data at 2 cpd. We conclude that mercury exposure levels found in the Amazon gold miners is high enough to damage the visual system and can beassessed by non-invasive electrophysiological techniques.
- Imprenta:
- Local: Chicago, USA
- Data de publicação: 2008
- Fonte:
- Título do periódico: Environmental Research
- Volume/Número/Paginação/Ano: v. 107, p. 98-107, 2008
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ABNT
COSTA, Genilma M da et al. Mercury toxicity in Amazon gold miners: visual dysfunction assessed by. Environmental Research, v. 107, p. 98-107, 2008Tradução . . Acesso em: 18 set. 2024. -
APA
Costa, G. M. da, Anjos, L. M. dos, Souza, G. S., Gomes, B. D., Saito, C. A., Pinheiro, M. da C. N., et al. (2008). Mercury toxicity in Amazon gold miners: visual dysfunction assessed by. Environmental Research, 107, 98-107. -
NLM
Costa GM da, Anjos LM dos, Souza GS, Gomes BD, Saito CA, Pinheiro M da CN, Ventura DSF, Silva Filho M da, Silveira LCL. Mercury toxicity in Amazon gold miners: visual dysfunction assessed by. Environmental Research. 2008 ; 107 98-107.[citado 2024 set. 18 ] -
Vancouver
Costa GM da, Anjos LM dos, Souza GS, Gomes BD, Saito CA, Pinheiro M da CN, Ventura DSF, Silva Filho M da, Silveira LCL. Mercury toxicity in Amazon gold miners: visual dysfunction assessed by. Environmental Research. 2008 ; 107 98-107.[citado 2024 set. 18 ] - Effects of fixed cutoff filtering on dark- and light-adapted ERG components and the application of variable cutoff filter
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