Concentrations of organochlorine pesticides in milk of Nicaragua Mothers
Breast-milk samples from 101 mothers from the basin of Rio Atoya, Nicaragua, were collected on two occasions within the first trimester of lactation. Milk samples were analyzed for 13 organochlorine pesticides: (1) p^p'-dichlorophenyldichloroethylene; (2) p,p^- dichlorophenyltrichloroethane;...
| Autores Principales: | Lacayo Romero, Martha, Cruz Granja, Adela del Carmen |
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| Formato: | Artículo |
| Idioma: | Español Español |
| Publicado: |
2000
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| Materias: | |
| Acceso en línea: |
http://repositorio.unan.edu.ni/2653/ http://repositorio.unan.edu.ni/2653/1/605.pdf http://repositorio.unan.edu.ni/2653/7/88x31_cc.png |
| Sumario: |
Breast-milk samples from 101 mothers from the basin of Rio Atoya, Nicaragua,
were collected on two occasions within the first trimester of lactation. Milk samples were
analyzed for 13 organochlorine pesticides: (1) p^p'-dichlorophenyldichloroethylene; (2) p,p^-
dichlorophenyltrichloroethane; (3) p,//-dichlorophenyldichlorodiene; (4) a-hexachlorocyclohexane;
(5) P-hexachlorocyclohexane; (6) y-hexachlorocyclohexane; (7) 8-hexachlorocyclohexane;
(8) toxaphene; (9) dieldrin; (10) endrin; (11) aldrin; (12) heptachlor; and (13)
heptachlor-epoxide. Organochlorines of the dichlorodiphenylethane class (i.e., p,p'-
dichlorodiphenylethane and p,p'-dichlorodiphenylethane) were found in all samples and at
the highest mean concentrations observed in the study. Chemicals in the hexachlorocyclohexane
family (i.e., a- and 5-hexachlorocyclohexane) were not found at all (0%), and the
other hexachlorocyclohexane compounds (i.e., P > y) were found in less than 6% of the samples.
Twenty percent or less of the sample contained chlorinated cyclodienes (i.e., dieldrin >
endrin > heptachlor-epoxide > heptachlor). No measurable concentrations of a-hexachlorocyclohexane,
aldrin, p,p'-dichlorophenyldichlorodiene, and toxaphene were found in the
breast milk samples. Analysis of variance demonstrated that only the concentration of p,p'-
dichlorophenyldichloroethylene p^p'-dichlorophenyltrichloroethane, and endrin were
affected significantly by maternal age. Overall, with the exception of p,p'-chlorophenyldichloroethylene,
and p,p'-dichlorophenyltrichloroethane, the mean concentrations
of the analyzed pesticides were low. Total p,p'-dichlorophenyltrichloroethane concentrations
that exceeded the allowed daily intake set by the World Health Organisation were
found in 5.9% of the samples. |
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