Middle Ear Function and Pathophysiology in Andean Children Living at High Altitudes.

Counter, S. Allen, Leo H. Buchanan, Fernando Ortega, Anthony B.

Assessment of the Brainstem-Mediated Stapedius Muscle Reflex in Andean Children Living at High Altitudes.

Counter, S. Allen, Leo H. Buchanan, Fernando Ortega, Anthony B.

Tracking blood lead and zinc protoporphyrin levels in Andean adults working in a lead contaminated environment.

The purpose of this study was to investigate current blood lead (PbB) and zinc protoporphyrin (ZPP) levels in adults presently living in environmentally Pb-contaminated Andean communities, and to compare the findings with the PbB and ZPP levels of Pb-exposed adult cohorts from the same study area tested between 1996 and 2007. Blood samples from 39 adults were measured for PbB and ZPP concentrations. The current mean PbB level (22.

Declining blood lead and zinc protoporphyrin levels in Ecuadorian Andean children.

Objectives: To investigate current lead (Pb) exposure in children living in Andean Ecuadorian communities. Blood Pb (PbB) and zinc protoporphyrin (ZPP) levels were used respectively as biomarkers of acute and chronic Pb poisoning. The current PbB-ZPP levels were compared with previous pediatric PbB-ZPP levels recorded over years in the study area.