Breast milk: a leading source of PCBs.
The study followed 173 children, slightly more than half of whom had been breast-fed as infants (usually for more than 3 months). By 42 months of age, all the children carried at least some PCBs in their blood. While prenatal exposures and childhood diet contributed some PCBs, breast milk proved the richest source, Svati Patandin of Sophia Children's Hospital in Rotterdam and her colleagues report in the October American Journal of Public Health. In fact, their data suggest that while the breast-fed infants were nursing, PCB concentrations in their blood "must have reached levels as high as their mothers'."
"To our knowledge," they observe, "no other study has measured plasma PCB levels in children--either formula-fed or breast-fed during infancy--in relation to environmental exposures to PCBs."
While many earlier studies attempted to quantify childhood exposure overall to the 209 PCBs, the Dutch researchers focused on just four representatives of this family of related chemicals. As such, notes Corine Koopman-Esseboom, a coauthor at Sophia Children's Hospital, it's hard to directly compare the Rotterdam exposures to those reported for U.S. populations. However, she says, the Dutch exposures "would appear comparable" to those linked with IQ deficits in Detroit youngsters last year (SN: 9/14/96, p. 165).
Koopman-Esseboom administered developmental tests to the Rotterdam infants at ages 3, 10, and 18 months. While the breast-fed babies had poorer muscle tone than the bottle-fed infants--something that she says was also seen in the PCB-exposed Detroit children--the Dutch youngsters exhibited no mental delays when compared to formula-fed peers. However, she notes that unpublished data from a follow-up looking for IQ deficits in the Dutch preschoolers "did find something."
The solution, she and her coauthors argue, is not to forgo breast-feeding but to lower PCB concentrations in the food chain so mothers accumulate less in their milk.
|Printer friendly Cite/link Email Feedback|
|Title Annotation:||a study in the Netherlands indicates that breast-fed babies tested when pre-school age, had 3.6 times more of the pollutant in their blood plasma than did children who were only formula-fed|
|Article Type:||Brief Article|
|Date:||Nov 29, 1997|
|Previous Article:||Pests find new ways around natural toxins.|
|Next Article:||Penile birth defect on the rise.|