Edgar Merchán-Hamann

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This multicentric population-based study in Brazil is the first national effort to estimate the prevalence of hepatitis B (HBV) and risk factors in the capital cities of the Northeast, Central-West, and Federal Districts (2004-2005). Random multistage cluster sampling was used to select persons 13-69 years of age. Markers for HBV were tested by(More)
A population-based survey to provide information on the prevalence of hepatitis viral infection and the pattern of risk factors was carried out in the urban population of all Brazilian state capitals and the Federal District, between 2005 and 2009. This paper describes the design and methodology of the study which involved a population aged 5 to 19 for(More)
BACKGROUND The objectives were to estimate the prevalence of hepatitis A among children and adolescents from the Northeast and Midwest regions and the Federal District of Brazil and to identify individual-, household- and area-levels factors associated with hepatitis A infection. METHODS This population-based survey was conducted in 2004-2005 and covered(More)
A qualitative research was realized to verify the occurrence and motivations for self-medication and the quality of the information rendered by pharmacies. We conducted 3 focus groups with 25 patients of a reference public health service for STD treatment in Brasília, Brazil. We used the critical discourse analysis to interpret the data obtained during(More)
Little data exists concerning the efficacy of the antiretroviral therapy in the Federal District in Brazil, therefore in order to improve HIV/AIDS patients' therapy and to pinpoint hot spots in the treatment, this research work was conducted. Of 139 HIV/AIDS patients submitted to the highly active antiretroviral therapy, 12.2% failed virologically. The(More)
This study analyzed occupational health hazards for Intensive Care Unit (ICU) nurses and nursing technicians, comparing differences in the number and types of hazards which occur at the beginning and end of their careers. A descriptive cross-sectional study was carried out with 26 nurses and 96 nursing technicians from a public hospital in the Federal(More)
OBJECTIVE To describe bisexual men's behavior in terms of sexual identity, condom use, frequency of sexual intercourse and types of partners and to determine rates of inconsistent condom according to partner's gender. METHODS Cross-sectional study nested in a cohort of HIV-negative homosexual and bisexual men in the city of Belo Horizonte, Southeastern(More)
RESUMEN Haemophilus influenzae del serotipo b (Hib), un bacilo gramnegativo, es to-davía causa importante de procesos infecciosos. La variante encapsulada de Hib es el principal agente causal de las formas invasoras de las enfermeda-des ocasionadas por esta especie, en particular otitis media, osteomielitis, neumonía y meningitis (1, 2). Cierta-mente, su(More)
Leishmaniasis patients were treated with N-methylglucamine antimoniate by intravenous injections of 10 or 20 mg of Sb per kilogram of body weight per day for 10 or 20 days. Digests of skin biopsies taken from the site of lesion before and after treatment were analyzed for antimony by instrumental neutron activation (INAA). The detection limit of the assay(More)
Four hundred and sixteen poor adolescents of both sexes in Rio de Janeiro were interviewed to study both their level of information and symbolic representations concerning AIDS risk and prevention. The most common source of information on HIV/AIDS was the mass media, particularly television broadcasts. There were doubts and lack of trust regarding official(More)
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