NDLI: Exposure assessment of pregnant Portuguese women to methylmercury through the ingestion of fish: cross-sectional survey and biomarker validation.

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Exposure assessment of pregnant Portuguese women to methylmercury through the ingestion of fish: cross-sectional survey and biomarker validation.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Nunes, Elisabete Cavaco, Afonso Carvalho, Cristina
Spatial Coverage	Portugal
Description	Country affiliation: Portugal Author Affiliation: Nunes E ( a Instituto de Investigação do Medicamento (iMed.ULisboa), Faculdade de Farmácia , Universidade de Lisboa Av. Prof. Gama Pinto , 1649-003 , Lisboa , Portugal.)
Abstract	Methylmercury (MeHg) contamination is a critical public health problem in Portugal, where fish is an important component of the daily diet. The Portuguese are the third largest consumers in the world (after Japan and Iceland) but first in Europe. Prenatal exposure to MeHg is believed to be linked to fetal/child neurodevelopment and behavioral impairments due to the neurotoxicity of the compound. The objective of this study was to assess the exposure of pregnant Portuguese women to mercury (Hg) due to fish consumption, calculating the indices of risk and confirming exposure through analyses of a biomarker of exposure. The study consisted of a cross-sectional evaluation of 343 pregnant women recruited at their visit to two antenatal care units in Lisbon, Portugal. A food frequency questionnaire was used to estimate prenatal exposure. Total Hg levels in hair were analyzed by atomic absorption, in samples from 186 women. The average fish consumption was 3.1 meals per week. Median Hg level in the hair was 1.26 µg/g (range: 0.07-5.3 µg/g). The mean calculated risk index was 0.81; however, 28% of the pregnant women ingested levels above the provisional tolerable weekly intake (PTWI) level recommended by the World Health Organization (WHO; 1.6 mg/kg per body weight), indicating the possibility of risk due to MeHg exposure. Multiple linear regression analysis showed the risk index was reliably predicted from predatory fish species and number of fish meals consumed per week. Ingestion of black and silver scabbard fish as well as mixed predatory fish cooked in traditional dishes enhanced the toxicity risk. In conclusion, some exposure levels exceeded the reference value; therefore, nutritional counseling needs to be provided to populations at risk.
File Format	HTM / HTML
ISSN	15287394
Issue Number	1-3
Volume Number	77
e-ISSN	10872620
Journal	Journal of Toxicology and Environmental Health, Part A
Language	English
Publisher	Taylor & Francis
Publisher Date	2014-01-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Health Discipline Toxicology Diet Food Contamination Maternal Exposure Statistics & Numerical Data Methylmercury Compounds Analysis Pregnancy Seafood Water Pollutants, Chemical Adolescent Adult Cross-sectional Studies Adverse Effects Diet Surveys Environmental Monitoring Methods Female Hair Chemistry Humans Linear Models Toxicity Portugal Risk Assessment Spectrophotometry, Atomic Questionnaires Young Adult Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Toxicology

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