Catfish consumption as a contributor to elevated PCB levels in a non-Hispanic black subpopulation

Area of Science:

• Environmental Health
• Toxicology
• Public Health

Background:

• Human body burden of polychlorinated biphenyls (PCBs) has declined since the US ban in 1979.
• Fish consumption remains the primary exposure source for the most affected 10% of the US population.
• National Health and Nutrition Examination Survey (NHANES) data identifies a non-Hispanic black subpopulation with the highest remaining PCB levels.

Purpose of the Study:

• To investigate catfish consumption as a significant PCB source for non-Hispanic black anglers.
• To identify factors contributing to higher PCB body burdens in this subpopulation.
• To propose solutions for mitigating racial disparities in PCB exposure.

Main Methods:

• Review of existing data, including NHANES.
• Comparative analysis of fishing and consumption habits between non-Hispanic black and white anglers.
• Identification of high PCB contamination watersheds.

Main Results:

• Non-Hispanic black anglers consume more catfish than non-Hispanic white anglers.
• They are more likely to consume the whole fish, increasing PCB intake.
• They are more likely to fish in PCB-contaminated watersheds.

Conclusions:

• Catfish consumption is a significant PCB exposure pathway for non-Hispanic black anglers, contributing to racial disparities.
• Geographic, economic, cultural, and educational barriers hinder efforts to reduce exposure.
• A targeted fish consumption survey is proposed to inform interventions and prevent similar toxic exposure disparities.