Yolanda Valcárcel Rivera

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BACKGROUND AND OBJECTIVE To calculate the incidence rates and direct costs, and to describe hospital admissions for malaria in Spain between 1999 and 2002. MATERIAL AND METHOD Retrospective study of hospital admissions whose fundamental discharge diagnosis was malaria (codes CIE-9 from 084.0 to 084.9), using the national surveillance system for hospital(More)
BACKGROUND in the last years, the presence of new contaminants in water has been rising. There are only few studies which analyze such presence. The aims were to determine the occurrence of drugs of abuse and their metabolites in the influent and effluent of the Sewage Treatment Plant (STP) in Talavera de la Reina, and the River Tagus, as well as to(More)
OBJECTIVE to determine the concentrations of petrochemical compounds in the drinking water sources of communities located near oil-producing fields in the Bolivian Chaco region. METHODS data were collected on total petroleum hydrocarbons (TPH), 16 polycyclic aromatic hydrocarbons (PAH), including benzene, toluene, ethylbenzene, and xylenes (BTEX), and 22(More)
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