SciELO - Scientific Electronic Library Online

 
vol.48 issue3Adaptation and validation of quality of life instrument Diabetes 39 for Mexican patients with type 2 diabetes mellitusPrevalence of dengue and leptospira antibodies in the state of Veracruz, Mexico author indexsubject indexarticles search
Home Page  

Salud Pública de México

Print version ISSN 0036-3634

Abstract

MANZANARES-ACUNA, Eduardo et al. Lead levels in high-risk populations and the surrounding environment in San Ignacio, Fresnillo, Zacatecas, México. Salud pública Méx [online]. 2006, vol.48, n.3, pp. 212-219. ISSN 0036-3634.  http://dx.doi.org/10.1590/S0036-36342006000300005.

OBJECTIVE:To determine the lead concentration in the blood of children and nursing or pregnant women from San Ignacio, Fresnillo, in Zacatecas, Mexico as well as in soil, plants, ash and lead-glazed pottery, in order to determine exposure due to a metal-recycling facility. MATERIAL AND METHODS: The study was carried out from December 2004 to April 2005. Lead in blood was measured with anodic stripping voltammetry, while dispersive energy X-ray fluorescence was used in the other matrices. RESULTS: Based upon the criteria outlined in the Official Mexican Standards, 90% of the children was identified as category I, 5% as category II and another 5% as category III. The soil in the land near the facility contained from 73 to 84 238 µg/g, with an average of 4940 µg/g. Larger lead concentrations were found on sites located closer to the facility. San Ignacio's soil contained, on average, 109 µg/g. High lead levels were found in glazed pottery and the concentration in agricultural crops was greater than 300 µg/g. CONCLUSIONS: Although the majority of children in San Ignacio have blood lead concentrations considered to be acceptable according to the Official Mexican Standards, several studies indicate that deleterious effects on children's health exist even at low concentrations. The land around the metal recycling facility is contaminated with lead, and to that extent, the crops that are produced there, once ingested, are a source of contamination, which is compounded by the use of glazed pottery.

Keywords : child; lead poisioning; blood; soil; Mexico.

        · abstract in Spanish     · text in Spanish     · pdf in Spanish