Overview
Berky et al. conducted two cross-sectional studies enrolling 307 individuals across 26 communities in Madre de Dios, a remote region of the southern Peruvian Amazon where indigenous and rural communities rely heavily on wild game as a food source. The study found that wild game consumption — specifically game hunted with lead ammunition — was a significant independent risk factor for elevated blood lead levels (BLL), after adjusting for indigenous status, sex, age, water source, and smoking. Background lead exposure was estimated at 20 µg/day, with a single meal of wild game contributing approximately 500 µg Pb. The authors also document a dual burden of lead (from wild game) and mercury (from piscivorous fish consumption) in communities dependent on local food systems, with a strong correlation between BLL and mercury exposure.
Key numbers
Blood lead levels (BLL), measured units µg/dL:
- Wild game consumption associated with BLL increase: 1.41 µg/dL (95% CI: 1.20–1.70)
- Two or more portions per serving vs smaller: 1.66 µg/dL (95% CI: 1.10–2.57) increase in BLL
- Indigenous status vs non-indigenous: 2.52 µg/dL (95% CI: 1.95–3.24) higher BLL
- Background Pb exposure estimate (EPA All-Ages Lead Model, AALM): 20 µg/day
- Pb dose from one wild game meal estimate (AALM): ~500 µg/meal
- Strong positive association between BLL and mercury exposure documented (wild game Pb and fish Hg as co-exposures in same population)
Lead source mechanism: Bullets upon impact fragment into hundreds of pieces, 34% under 0.01 g; many fragments are microscopic, making complete removal infeasible. An isotopic analysis cited by authors found 86% (in oil-extraction region) and 57% (non-oil region) of lead in hunted wild game traceable to bullet lead.
Regression model: community random effects to account for clustering; covariates included sex, age, indigenous status, water source, smoking, diet items.
Methods (brief)
Two cross-sectional studies pooled (2015 and 2018). Blood lead and blood mercury analysis (methods not fully detailed in abstract; BLL and hair mercury used). EPA All-Ages Lead Model (AALM) used for dose estimation. n=307 individuals, 26 communities. Oil exploitation absent from Madre de Dios at time of study — controls for oil-spill confounders.
Limitation: Cross-sectional design; BLL as endpoint rather than direct food Pb measurement. Wild game meat Pb concentrations are inferred via AALM rather than directly measured in this paper.
Implications
Certification: Wild game meat is not an HMT&C product category, but this paper is relevant to the ingredient/food-chain context for Pb exposure from non-commercial food sources in indigenous and subsistence populations. Documents a frequently underappreciated dietary Pb exposure pathway.
Courses: Key case study illustrating that lead ammunition in game meat is a meaningful dietary exposure source; that dual exposure to Pb (meat) and Hg (fish) creates compounded risk in communities reliant on local food systems; and that indigenous status is an independent predictor of BLL, likely driven by dietary patterns.
App: Wild game / bushmeat ingredient flag for Pb risk, particularly in subsistence contexts; dual-metal flag (Pb + Hg) for populations combining wild game and piscivorous fish consumption.
Microbiome: Not addressed.
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Update history
The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git. When DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.
| Commit | Date | Change | Description |
|---|---|---|---|
| e317189 | 2026-08-11 | correction | 6 sections added; narrative text revised |