High lead exposure and auditory sensory-neural function in Andean children
| Autor: | Fernando Ortega, Göran Laurell, Marie Vahter, Counter Sa, Leo H. Buchanan, Staffan Skerfving |
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| Rok vydání: | 1997 |
| Předmět: |
Male
medicine.medical_specialty Ceramics Adolescent Health Toxicology and Mutagenesis Hearing Loss Sensorineural Sensory system Audiology Evoked Potentials Auditory Brain Stem Medicine Humans Auditory function Child Auditory thresholds Auditory brain stem response medicine.diagnostic_test business.industry Pure tone Public Health Environmental and Occupational Health Auditory Threshold Environmental Exposure Lead Poisoning Case-Control Studies Child Preschool Neural function Lead exposure Audiometry Pure-Tone Female Ecuador Audiometry business Research Article |
| Zdroj: | Environmental Health Perspectives |
| ISSN: | 0091-6765 |
| Popis: | We investigated blood lead (B-Pb) and mercury (B-Hg) levels and auditory sensory-neural function in 62 Andean school children living in a Pb-contaminated area of Ecuador and 14 children in a neighboring gold mining area with no known Pb exposure. The median B-Pb level for 62 children in the Pb-exposed group was 52.6 micrograms/dl (range 9.9-110.0 micrograms/dl) compared with 6.4 micrograms/dl (range 3.9-12.0 micrograms/dl) for the children in the non-Pb exposed group; the differences were statistically significant (p < 0.001). Auditory thresholds for the Pb-exposed group were normal at the pure tone frequencies of 0.25-8 kHz over the entire range of B-Pb levels, Auditory brain stem response tests in seven children with high B-Pb levels showed normal absolute peak and interpeak latencies. The median B-Hg levels were 0.16 micrograms/dl (range 0.04-0.58 micrograms/dl) for children in the Pb-exposed group and 0.22 micrograms/dl (range 0.1-0.44 micrograms/dl) for children in the non-Pb exposed gold mining area, and showed no significant relationship to auditory function. Images Figure 1. Figure 3. A Figure 3. B |
| Databáze: | OpenAIRE |
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