Machado da. Mercúrio total em parturientes e neonatos da Cidade de Itaituba-Pará-Brasil
Fecha
2020-12-01Autor
http://lattes.cnpq.br/5202168262491743
https://orcid.org/0000-0002-8619-1332
SILVA, Domingas Machado da
Metadatos
Mostrar el registro completo del ítemResumen
Introduction: Due to the natural and anthropogenic processes, nowadays Mercury (Hg) is one
of the main contaminants of soils and rivers of the Tapajós River region. This metal exists in
nature in metallic, inorganic and organic forms, being this last one the one of greater concern
at the level of the human toxicity. The environmental exposure to Hg via the food chain, mainly
for consumers of higher trophic level, including humans, is significantly higher, once this metal
presents high toxicity and capacity to undergo bioaccumulation and biomagnification along the
food chains, by the ingestion of food (fish, crustaceans and cephalopods). Objective: To
determine the levels of total mercury (HgT) in populations of neonates and their mothers.
Methodology: Consists of an observational, quantitative, analytical and exploratory
investigation, carried out through bibliographic, field and laboratory research, using biological
matrices of hair and nail samples (maternal), umbilical cord tissue and umbilical cord blood
(neonates), research at the Obstetrics Clinic of the Municipal Hospital of Itaituba - Pará, with
the approval of CEP/UEPA under seem: 3.031.069, with 110 voluntary parturients, after
signing the Free and Informed Consent Term, and application of a semi-structured
questionnaire. Results and discussion. The concentration of THg being the mean ± standard
deviation found: in hair was (1 ,83 ± 2,48), in nail (0,72 ± 0,91), and in umbilical cord blood
(0,07 ± 0,14) µg/g and in cord blood (0,005 ± 0,005) µg/L. The concentrations presented are
within the values considered safe and do not present neurological alterations in the mother or
risk for neonates according to the reference values of the World Health Organization.
Conclusion: The toxic effects of Hg are determined by the amount of metal involved and the
time of exposure. Fetal neurotoxicity and post-natal changes, such as developmental delay or
other neurological changes, may occur in the children of women exposed to Hg during
pregnancy. Thus, the continuous monitoring of the presence of this metal in humans and the
environment makes it essential, in order to avoid the occurrence of human contamination by
Hg.