Use of lead isotope ratios to identify sources of lead exposure in Alaska Natives

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Patel, Manish M ; Adrianne, Holmes ; Jones, Robert ; Jarrett, Jeff ; Berner, James ; Rubin, Carol S (2008)
  • Publisher: Co-Action Publishing
  • Journal: International Journal of Circumpolar Health (issn: 1797-237X, eissn: 1239-9736)
  • Related identifiers: doi: 10.3402/ijch.v67i2-3.18283
  • Subject: birds; human; lead; lead isotope; lead shot; seabirds

OBJECTIVES: Although banned nationwide for waterfowl hunting, lead shot is still used for hunting in regions of Alaska. Consumption of birds hunted with lead shot may be a route of human lead exposure in susceptible populations. The Centers for Disease Control and Prevention (CDC) and Alaskan health officials conducted a cross-sectional exposure assessment and used isotope ratios (IR) to test that assumption. STUDY DESIGN: Cross-sectional exposure assessment study. METHODS: We compared isotopic profiles of blood lead in Alaska Native women from Bethel (n = 10) and Barrow (n = 10) to lead shot samples purchased from the respective regions. To evaluate the source of lead for the buckshot, we evaluated IR profiles for lead mineral and ore from a smelter in Torreon, Mexico, a suspected source of origin for the lead. RESULTS: The lead IRs for the blood lead differed significantly from the lead shot IRs (p < 0.001); thus, lead shot is unlikely to be the sole source of lead exposure of public health significance in participants of this study. Overlap in IRs for the lead shot and blood lead existed for 6 (30%) of the women from Bethel and Barrow; however, no correlation was noted between lead levels and the IRs for the blood lead. IR profiles for lead mineral and ore from Mexico were substantially different from the IRs of lead shot from Alaska, confirming that buckshot in this study is unlikely to originate from the Mexican smelter. CONCLUSIONS: Lead shot from the manufacturer in this study does not appear to be the sole source of lead exposure in most participants; nonetheless, lead shot could yet be a potential source of exposure in some populations, possibly those whose diet consists of game hunted with lead shot.Keywords: birds; human; lead; lead isotope; lead shot; seabirds(Int J Circumpolar Health 2008; 67(2):261-268)
  • References (17)
    17 references, page 1 of 2

    1. Johansen P, Asmund G, Riget F. Lead contamination of seabirds harvested with lead shot-implications to human diet in Greenland. Environ Pollut 2001;112(3):501- 504.

    2. Johansen P, Asmund G, Riget F. High human exposure to lead through consumption of birds hunted with lead shot. Environ Pollut 2004;127(1):125-129.

    3. Johansen P, Pedersen HS, Asmund G, Riget F. Lead shot from hunting as a source of lead in human blood. Environ Pollut 2006;142(1):93-97.

    4. Bjerregaard P, Johansen P, Mulvad G, Pedersen HS, Hansen JC. Lead sources in human diet in Greenland. Environ Health Perspect 2004;112(15):1496-1498.

    5. Hanning RM, Sandhu R, MacMillan A, Moss L, Tsuji LJ, Nieboer E. Impact on blood Pb levels of maternal and early infant feeding practices of First Nation Cree in the Mushkegowuk Territory of northern Ontario, Canada. J Environ Monit 2003;5(2):241-245.

    6. Burger J, k ennamer RA, Brisbin IL, Jr., Gochfeld M. A risk assessment for consumers of mourning doves. Risk Anal 1998;18(5):563-573.

    7. Finkelstein ME, Gwiazda RH, Smith DR. Lead poisoning of seabirds: environmental risks from leaded paint at a decommissioned military base. Environ Sci Technol 2003;37(15):3256-3260.

    8. Scheuhammer A, Perrault J, Routhier E, Braune B, Campbell G. Elevated lead concentrations in edible portions of game birds harvested with lead shot. Environ Pollut 1998;102(2):251-257.

    9. U.S. Fish and Wildlife Service. Nontoxic shot regulations for hunting waterfowl and coots in the U.S. [cited 2008 Jan 7]. Available from: http://migratorybirds.fws.gov/issues/nontoxic_shot/nontoxic.htm.

    10. Gay J. Lead from hunters' shot turns up in birds, Alaskans. Anchorage Daily News; 24 May 2004 [cited 2008 Jan 7]. Available from: http://dwb.adn.com/ front/story/5107755p-5034663c.html.

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