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Published on: May 7, 2013
Animals as sentinels for human lead exposure: a case report
Karyn Bischoff1, Heather Priest, Amy Mount-Long
1Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 13081, USA. KLB72@cornell.edu
Summary
Domestic animals, including cattle, can serve as sentinels for environmental lead exposure affecting humans. This case study found elevated lead levels in farm animals and a pregnant woman, identifying barn and home paint as the likely source.
Area of Science:
- Environmental Health
- Toxicology
- Veterinary Medicine
Background:
- Concurrent exposure to environmental toxicants is common in shared human and animal environments.
- Domestic animals can act as sentinels, indicating potential human exposure to hazardous agents.
- Lead poisoning is a significant environmental health concern with potential impacts on both human and animal populations.
Purpose of the Study:
- To present a case study of concurrent human and domestic animal exposure to lead contamination.
- To investigate the source of lead exposure on a farm.
- To evaluate the potential of cattle as sentinel species for environmental lead contamination.
Main Methods:
- Postmortem tissue analysis of deceased cattle to determine lead concentrations.
- Blood lead level testing in remaining cattle, a dog, a cat, and a pregnant woman.
- Environmental investigation to identify the source of lead exposure.
Main Results:
- Cattle deaths were attributed to lead poisoning based on elevated tissue lead concentrations.
- Elevated blood lead concentrations were detected in surviving cattle, a dog, a cat, and a pregnant woman.
- Lead concentrations in domestic animals ranged from 8.42 μg/dL (cat) to 85.41 μg/dL (calf).
- Paint in the barn and home was identified as the most probable source of lead exposure.
Conclusions:
- Cattle can serve as effective sentinel species for detecting environmental lead contamination that also affects humans.
- This case highlights the importance of considering domestic animals in environmental health assessments.
- Prompt identification of lead sources is crucial for mitigating exposure in both human and animal populations.
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