Relationship between pollution heavy metals and anemia among Mexican schoolchildren

Abstract Number Theme Presentation Type Cover Approved
0499 Prevalence and risk factors for micronutrient status(deficiency, overload) Poster Approved


Abstract Content


to evaluate relationship between pollution by heavy metals and anemia of school children from Hidalgo, Mexico.


In a probabilistic sample of 750 school children from Hidalgo Mexico, were evaluated hemoglobin levels with cyanmethemoglobin method. The anemia diagnosis was made: 5-11 years old children =11.5 g / dL and 12-15 years of = 12.0 g / dL. The quantification of chemical elements in dried blood was performed using scanning electron microscopy (SEM) with energy dispersive microanalysis X-ray. The elements analyzed were: sodium, chloride, magnesium, potassium, calcium, phosphorus, sulfur, iron, zinc, copper, carbon, nitrogen and oxygen and silicon, chromium, lead, titanium, vanadium, nickel, arsenic, manganese, cadmium and mercury. Data are presented as relative proportions.


The prevalence of anemia was 11.7%. The averages of the elements evaluated did not differences between anemic (A) and non-anemic (NA,) except for arsenic (0.225 ± 0.17 vs 0.123 ± 0.09; p = 0.045 T-test), sulfur, carbon and nitrogen. In blood of children was Identified lead, chromium, vanadium, nickel, cadmium, titanium, silicon and manganese, but the average did not vary between A and NA.


Evidence that arsenic contamination is related to the 18% of students diagnosed with anemia was found. Heavy metals detected in the blood of children can affect the nutritional status and increase the risk for other diseases such as cancer.

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