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dc.contributor.authorSantos, Felipe Araújo dos-
dc.date.available2023-11-24-
dc.date.available2023-11-27T14:47:34Z-
dc.date.issued2023-08-31-
dc.identifier.urihttp://repositorioinstitucional.uea.edu.br//handle/riuea/5375-
dc.description.abstractHuman T-cell lymphotropic virus is a retrovirus, which was discovered in 1980 and specifically isolated from a patient with cutaneous T-cell lymphoma. Over the years, HTLV types have been identified, totaling four types (HTLV-1, HTLV-2, HTLV-3 and HTLV-4). Although most of those infected with one or more types are asymptomatic carriers, 2 to 5% of this infected population may present with chronic encephalomyelopathy and HTLV-1- associated myelopathy/tropical spastic paraparesis (HAM/TSP). The methodologies for virus diagnosis are: chemiluminescence (CLIA); enzyme-linked immunosorbent assay (ELISA), used in the qualitative phase or screening for the virus, this phase is responsible only for its detection in the sample of the infected. The confirmation or distinction of the virus is performed by: western blot (WB) or polymerase chain reaction (PCR), in the confirmatory phase. The tests have negative particularities that decrease their diagnostic capacity being used separately or increase their high costs when used together. Therefore, the present study evaluated the incidence of HTLV-1/2 in blood donors treated at the HEMOAM foundation from 2018 to 2022, using commercial and conventional methodologies for diagnosis as well as new FC-Duplex and FC-Simplex HTLV-1/2 IgG1 assays, in addition to the evaluation of these methodologies, updating sociodemographic data of blood donor infection in Amazonas. A total of 409 donors were found to be unfit for blood donation by CLIA during the survey period. Only 151 individuals of the total found accepted through a free and informed consent form (ICF) to participate in the project. We conclude with the evaluations carried out the maintenance of the low prevalence (0.15%) of the virus among the studied group. The good performances of the WB and CLIA methodologies in their due stages of use, as well as the promise of using the FC-Simplex and FC-Dlupex HTLV-1/2 IgG1 assays as a diagnostic method for the viruspt_BR
dc.languageporpt_BR
dc.publisherUniversidade do Estado do Amazonaspt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectHTLVpt_BR
dc.subjectCitometria de fluxopt_BR
dc.subjectFC- Duplex HTLV-1/2pt_BR
dc.subjectHemocentro do Amazonaspt_BR
dc.titleIncidência de HTLV-1/2 em candidatos à doação de sangue do Amazonas : um estudo observacional comparando diferentes métodos de diagnósticopt_BR
dc.title.alternativeIncidence of HTLV-1-2 in blood donation candidates from Amazonas - an observational study comparing different diagnostic methodspt_BR
dc.typeDissertaçãopt_BR
dc.date.accessioned2023-11-27T14:47:34Z-
dc.contributor.advisor-co1Martins Filho, Olindo Assis-
dc.contributor.advisor-co1Latteshttp://lattes.cnpq.br/6260226537155026pt_BR
dc.contributor.advisor1Costa, Allyson Guimarães da-
dc.contributor.advisor1Latteshttp://lattes.cnpq.br/7531662673281014pt_BR
dc.contributor.referee1Costa, Allyson Guimarães da-
dc.contributor.referee1Latteshttp://lattes.cnpq.br/7531662673281014pt_BR
dc.contributor.referee2Quetz, Josiane da Silva-
dc.contributor.referee2Latteshttp://lattes.cnpq.br/5218470931187828pt_BR
dc.contributor.referee3Tarragô, Andréa Monteiro-
dc.contributor.referee3Latteshttp://lattes.cnpq.br/4644326589690231pt_BR
dc.description.resumoO vírus linfotrópico de células T humana é um retrovírus, que foi descoberto em 1980 e especificamente isolado de um paciente com linfoma cutâneo de células T. Ao longo dos anos, tipos do HTLV foram identificados, totalizando quatro tipos (HTLV-1, HTLV-2, HTLV-3 e HTLV-4). Embora a maioria dos infectados por um ou mais tipos sejam portadores assintomáticos, 2 a 5% dessa população infectada pode apresentar encefalomielopatia crônica e mielopatia associada ao HTLV-1/paraparesia espástica tropical (HAM/TSP). As principais metodologias para identificação e diagnóstico do vírus são a quimioluminescência (CLIA) e ensaio imunoenzimático (ELISA), utilizados na fase qualitativa ou triagem, além do Western Blot (WB) e Reação em Cadeia da Polimerase quantitativa (qPCR), para confirmação e diagnóstico. Os testes possuem diversas particularidades e seu uso isolado pode ser falho nessa avaliação, embora sua utilização combinada pode gerar altos custos aos serviços de saúde. Diante disso, o presente estudo avaliou a incidência de HTLV-1/2 em doadores de sangue atendidos na Fundação Hospitalar de Hematologia e Hemoterapia do Amazonas (HEMOAM), utilizando diferentes métodos para identificação dessa infecção. Foram encontrados 409 doadores de sangue com sorologia positiva para o HTLV-1/2 pelo ensaio CLIA, durante o período de levantamento (2018-2022), com incidência de 0.15%. Apenas 151 indivíduos retornaram ao hemocentro, realizaram nova coleta e aceitaram participar do estudo. Após a realização dos testes, observamos que CLIA apresentou excelente desempenho como etapa de triagem, exibindo sensibilidade de 100%. Embora os dados de acurácia (62.4%) não sejam animadores, observamos que outro ensaio, o FC-Simplex, apresentou melhor desempenho (acurácia = 91.5%) para o diagnóstico da infecção. Adicionalmente, a extensão desse ensaio, o FC-Duplex, apresentou concordância de 100% com os resultados obtidos pelo método padrão-ouro estabelecido no estudo (Western Blot) para distinção entre HTLV-1 e 2. Concluímos que é baixa a incidência (0,15%) do vírus em nossa população. Além disso, os métodos avaliados apresentaram bons resultados, e as novas metodologias demonstraram ser promissoras para confirmação do diagnóstico e identificação do tipo de vírus causador da infecção após os testes de triagem.pt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.programPPGH -PROGRAMA DE PÓS-GRADUAÇÃO EM CIÊNCIAS APLICADAS À HEMATOLOGIApt_BR
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