247 Estimating the Health Risk of Children Exposed to Lead in Avalos, Chihuahua, Mexico

Thursday, November 5, 2009: 10:20 AM
Kohlberg (Camino Real Hotel)
Edna M. Rico-Escobar, MD, MSci. , Departments of Basic Sciences, Universidad Autonoma de Ciudad Juarez, Cd. Juarez, Mexico
Fernando Díaz-Barriga, PhD , Departamento de Toxicología Ambiental, Facultad de Medicina, Universidad Autónoma de San Luis Potosí, México, San Luis Potosí, Mexico
Jaqueline Calderón, PhD , Departamento de Toxicología Ambiental, Facultad de Medicina,, Universidad Autónoma de San Luis Potosí, México, San Luis Potosí, Mexico
Environmental policies in Mexico have contributed to the reduction in the production or use of metals. However, monitoring carried out in nine states performed in the year 2004 concluded that 100% of children have lead in blood (4.6 µg/dL). According to the Environmental Health Program issued by the Health Department in 2006, 33% of the burden disease is caused by the environment. Therefore, the objective of this study was to conduct a screening for blood levels of lead in children, attending a school located in an area near smelter closed 13 years ago, but which operated for nearly 90 years. The study area was stratified according to the smelter distance, the first stratum was 600 to 1200 meters in which the school is located, the second at 1200 to 1800 meters. 53 children were analyzed in 2005 (6-12 years old).  The lead level range from 4.70 to 32 µg/ dL with a geometric mean in the first stratum of 14.45 (SD 7.6) µg/ dL; 66.66% of the children had values >10 µg/ dL in the second stratum the geometric mean was 9.92 (SD 3.2) µg/ dL and 53.8% had values >10 µg/ dL. Although the concentration of lead decreases with distance from the smelter, a residual contamination persist and continues being a risk to the population so it is necessary to carry out remedial measures and hygiene in the community