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)
BACKGROUND : There are few studies on HIV subtypes and primary and secondary antiretroviral drug resistance (ADR) in community-recruited samples in Brazil. We analyzed HIV clade diversity and prevalence of mutations associated with ADR in men who have sex with men in all five regions of Brazil. METHODS : Using respondent-driven sampling, we recruited 3515(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)
Influenza is a viral disease of global concern that has demanded the attention of health authorities. Since 1947, as a preventive measure, the World Health Organization monitors viral circulation to define the annual vaccine through a worldwide network of laboratories. This article presents the structuring of influenza surveillance in Brazil and highlights(More)
Central Venous Catheters (CVC), widely used in Intensive Care Units (ICU) are important sources of bloodstream infections (BSI). This prospective cohort epidemiological analytical study, aimed to infer the incidence of BSI, the risk factors associated and evaluate the care actions related to the use of these catheters in seven ICU in the Federal(More)
Efficacy and safety of meglumine antimoniate and sodium stibogluconate BP 88R were compared in cutaneous leishmaniasis treatment in Corte de Pedra, Bahia, an endemic area of leishmaniasis due to Leishmania (Viannia) braziliensis. An open trial was developed with one hundred twenty seven patients who were diagnosed based on clinical criteria and Montenegro's(More)
INTRODUCTION The aim of this study was to evaluate the reliability of self-reported HIV among men who have sex with men (MSM) in Brazil. METHODS MSM 18 years of age or older were recruited to a multicenter study using respondent-driven sampling. We compared self-report of the HIV test with a rapid HIV test using the kappa coefficient. RESULTS A total of(More)
Non-compliance with highly active antiretroviral therapy can reduce treatment efficacy and lead to viral resistance. Side effects can interfere with patients' quality of life. Our objectives were to estimate levels of treatment compliance and investigate the main predictors of non-compliance. The study design was cross-sectional. For purposes of comparison,(More)
The aim of this study is to estimate the prevalence of HIV/HBV and HIV/HCV coinfections among AIDS cases reported in Brazil, and to describe the epidemiological profile of these cases. Coinfection was identified through probabilistic record linkage of the data of all patients carrying the HIV virus recorded as AIDS patients and of those patients reported as(More)
BACKGROUND Aids affects the epidemiological characteristics of tuberculosis, due to both the changes in the clinical progress of the jointly affected patients, as well as the increase in the number of tuberculosis cases among individuals having tested positive for hiv/aids. This may lead to an increase in the transmission of the bacillus among the(More)