Dissertações em Doenças Tropicais (Mestrado) - PPGDT/NMT
URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/3559
O Mestrado Acadêmico em Doenças Tropicais iniciou em 2004 e pertence ao Programa de Pós-Graduação em Doenças Tropicais do Núcleo de Medicina Tropical (NMT) da Universidade Federal do Pará (UFPA).
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Item Acesso aberto (Open Access) Análise multivariada de características clínicas de PET/MAH e níveis de expressão gênica e derivação de modelos de predição diagnóstica em pacientes infectados com o HTLV-1(Universidade Federal do Pará, 2017) VIRGOLINO, Rodrigo Rodrigues; RODRIGUES, Anderson Raiol; http://lattes.cnpq.br/4030747999301402Human T-cell lymphotropic virus type 1 (HTLV-1)- associated myelopathy/tropical spastic paraparesis (HAM/TSP) is a debilitating condition resulting from inflammation of the nerve tissue of the spinal cord caused by the action of HTLV-1. The aim of the present study was to evaluate the classification of individuals infected with HTLV-1 and propose a clinical prediction model for the occurrence of HAM/TSP. A database composed of 63 infected individuals was used, 23 of whom were diagnosed with HAM/TSP using the criteria recommended by the World Health Organization. Functional predictors (ordinal variables), gene expression levels (continuous variables) and sex (demographic variable) were also used. A mixed principal component analysis was employed, followed by hierarchical cluster analysis to determine the allocation of individuals into groups in an unsupervised fashion and compare the results to the classifications defined by clinicians. Diagnostic prediction models were then derived based on penalized binary logistic regression, which is suitable when the sample size is small. The unsupervised analysis showed that the patients were arranged into three groups: patients with HAM/TSP, patients without HAM/TSP and an intermediate group composed of individuals with and without the disease. Two models were derived from the statistical modeling – one with a penalization criterion of 0.032 and another with a criterion of 0.1 (more extreme). Both models were evaluated by internal validation using 10-fold crossvalidation. The variables that composed the final models were degree of gait alteration, derived Tinetti score, left and right adductor muscle tone and left triceps surae muscle tone. Statistical prediction methods may constitute a useful tool to support the diagnoses of HAM/TSP, especially in settings with limited resources.Item Acesso aberto (Open Access) Avaliação do estado secretor ABH e Lewis em mulheres não grávidas com e sem risco de desenvolver vulvovaginite por Candida sp(Universidade Federal do Pará, 2003) CARNEIRO, Ligia Maia; CORVELO, Tereza Cristina de Oliveira; http://lattes.cnpq.br/7253864056606024Na epidemiologic study of Candida sp infection prevalence in non-pregnant women was performed in a population of the north of Brazil (Belem-Pa, 2002). This paper aims to contribute to clear up the infection mechanisms of Candida sp and its possible association to ABO and Lewis group blood antigens and ABH substances secretory status. Such paper comprehended a total of 165 women admitted at the out-patient clinic of "Hospital da Policia Militar" and "Laboratorio de Analises Clinicas do Centro de Ciencias Biologicas da Universidade Federal do Para", who came to those units to undergo gynaecologic examinations, where blood, salive and vaginal mucus samples were taken. Candida sp infection presence was determined through the examination of fresh vaginal secretion and bacterioscopy of vaginal secretion. The identification of ABH and Lewis phenotipes in the blood was determined through direct hemaglutination tests and, in the salive, by Elisa Dot-blot. It was performed a standard form for the obtaining of epidemiologic information. Candida sp prevalation was 47.9%. Among the most commom signals and symptoms associed to Candida sp infections are pruritus and gleet. Women under 40 who did not use condoms and who have already had previous infections presented a higher risk of vulvo-vaginal infection caused by Candida sp. Infected and non-infected women with Candida sp had similar distribuition to the phenotypes of ABO, Lewis blood groups and ABH substances secretory status. And, comparing the expressions of Lewis antigens in the blood, save and vaginal mucus, it was verified that both secretions expressed Lewis antigens without any close relationship to erithrocitic Lewis phenotypes. In such context, it is considered that the nature of genetics diversity in the interaction between Candida sp and host requires more studies involving the identification of different types to determine their probable associations among ABH and Lewis blood groups phenotypes with cadidiasis.