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Updated: May 30, 2026
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An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium
Published on: December 17, 2018
Biomonitoring as an intervention against methylmercury exposure
Lynda Knobeloch1, Carrie Tomasallo, Henry Anderson
1Wisconsin Department of Health Services, 1 W Wilson, Room 150, Madison, WI 53701, USA. Lynda.knobeloch@wi.gov
Public Health Reports (Washington, D.C. : 1974)
|August 2, 2011
Summary
Biomonitoring hair mercury levels effectively reduced methylmercury exposure in individuals. Providing personalized results and advice on fish consumption led to long-term changes in dietary habits and lower mercury levels.
Area of Science:
- Environmental Health
- Toxicology
- Public Health Interventions
Background:
- Methylmercury exposure is a significant public health concern, primarily from consuming contaminated fish.
- Biomonitoring plays a crucial role in assessing and managing environmental toxin exposure in populations.
Purpose of the Study:
- To evaluate the effectiveness of biomonitoring, specifically hair mercury analysis, as an intervention to reduce methylmercury exposure.
- To assess the long-term impact of personalized feedback on fish consumption habits.
Main Methods:
- A statewide study in Wisconsin involved 2,031 participants assessed for fish consumption and hair mercury levels in 2004.
- Individuals with hair mercury >1 microgram per gram (microg/g) were advised to limit predatory fish intake; others received general health advice.
- Follow-up assessments, including questionnaires and hair sampling, were conducted in 2008.
Main Results:
- A total of 1,139 participants completed the follow-up assessment.
- Fish intake increased slightly overall, but significantly decreased among those with elevated mercury levels in 2004.
- The proportion of individuals with hair mercury levels >1 microg/g decreased from 300 in 2004 to 206 in 2008.
Conclusions:
- Hair mercury analysis combined with tailored educational messages demonstrated a lasting positive effect on reducing methylmercury exposure.
- These findings underscore the public health value of methylmercury screening and results-based education for frequent fish consumers.
