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The effect of polybrominated biphenyl on infants and young children
Insights
Polybrominated biphenyls (PBBs) exposure in early life did not impact physical growth or neurological development in children. However, parents reported increased illnesses, and higher PBB levels correlated with lower developmental test scores.
Area of Science:
- Environmental Health
- Pediatric Toxicology
- Developmental Pediatrics
Background:
- Polybrominated biphenyls (PBBs) are persistent organic pollutants with potential health risks.
- Exposure during critical developmental windows (in utero, infancy) may cause maximal damage.
- Previous studies on PBBs' long-term effects on children are limited.
Purpose of the Study:
- To evaluate the effects of PBB exposure on physical growth, neurological assessment, and developmental outcomes in children.
- To compare health outcomes between children exposed to PBBs and unexposed controls.
Main Methods:
- A cohort of 33 children exposed to PBBs (born 1973-1975) was compared to 20 unexposed children.
- Evaluations included physical growth, physical examination, and neurologic assessments.
- Parental reports of illnesses and PBB blood levels were also analyzed.
Main Results:
- No significant effects of PBB exposure were found on physical growth, physical examination, or neurologic assessments.
- Parents of exposed children reported a higher incidence of illnesses, particularly respiratory issues.
- An inverse relationship was observed between PBB blood levels and performance on specific developmental tests.
Conclusions:
- PBB exposure did not yield detectable effects on physical or neurological development in the studied cohort.
- Parental reports suggest potential increased morbidity, especially respiratory illnesses.
- Further investigation is warranted regarding the subtle effects of PBBs on cognitive and developmental trajectories.
Abstract:
The effects of PBB on 33 children born between September 1, 1973, and December 31, 1975, were evaluated in September, 1977. These children, born to families who lived on quarantined farms, were compared to 20 children who were not exposed to PBB. The birthdate interval was selected to obtain children who were exposed in utero or in early infancy or both, the two time periods when damage to developing tissues and organ systems should have been maximal. The results of these studies failed to identify any effects on physical growth, physical examination, or neurologic assessment, although the parents indicated by historical review that the exposed children had had more illnesses, especially respiratory, than had the control children. There were some indications of an inverse relationship between PBB fast level and performance on selected developmental tests.