Document Detail

Longitudinal hair mercury concentration in riverside mothers along the Upper Madeira river (Brazil).
MedLine Citation:
PMID:  9600799     Owner:  NLM     Status:  MEDLINE    
Mercury releases from gold mining occurred during the 1980s in the Upper Madeira river, a Southern tributary of the Amazon. Downstream from these areas, riverside residents rely on fish consumption for subsistence. In July of 1993, hair samples were collected for mercury analysis from a group of mothers and their infants and one pregnant woman. By assuming a constant rate of hair growth (1.1 cm per month), a temporal profile of the methylmercury exposure was determined for the previous 2 to 3 years. The length of hair segments corresponded to hair growth during pregnancy and the subsequent breastfeeding periods. During all periods, hair mercury concentrations in six mothers were in the range of 4.5-26.8 ppm, slightly lower than those of their infants (8.2-28.4 ppm). Further segmental analyses of hair mercury from another six mothers showed concentrations in the range of 12.2-41.0 ppm during the three trimesters of pregnancy and 4.0-33.5 ppm during breast feeding-slightly lower than their infants (11.6-50.4 ppm). Another four mothers showed hair mercury concentrations in the range of 21. 3-84.4 ppm.
A A Boischio; E Cernichiari
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental research     Volume:  77     ISSN:  0013-9351     ISO Abbreviation:  Environ. Res.     Publication Date:  1998 May 
Date Detail:
Created Date:  1998-06-11     Completed Date:  1998-06-11     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0147621     Medline TA:  Environ Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  79-83     Citation Subset:  IM    
Copyright Information:
Copyright 1998 Academic Press.
Institute of Collective Health, Federal University of Bahia, Rua Padre Feijó 29-4 andar, Canela, Salvador, 40110-170, Brazil.
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MeSH Terms
Brazil / epidemiology
Dose-Response Relationship, Drug
Environmental Exposure / adverse effects
Fresh Water / chemistry*
Hair / chemistry*,  drug effects
Infant, Newborn
Longitudinal Studies
Maternal Exposure / adverse effects
Mercury / adverse effects,  analysis*
Mercury Poisoning / epidemiology,  etiology
Methylmercury Compounds / adverse effects,  analysis*
Pregnancy Trimester, First
Pregnancy Trimester, Second
Time Factors
Water Pollutants, Chemical / adverse effects
Reg. No./Substance:
0/Methylmercury Compounds; 0/Water Pollutants, Chemical; 7439-97-6/Mercury

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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