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Master's Dissertation
DOI
https://doi.org/10.11606/D.42.2012.tde-23042013-105331
Document
Author
Full name
Priscila Thihara Rodrigues
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2012
Supervisor
Committee
Ferreira, Marcelo Urbano (President)
Ribolla, Paulo Eduardo Martins
Wunderlich, Gerhard
Title in Portuguese
Genomas mitocondriais de Plasmodium vivax e a origem geográfica da malária importada.
Keywords in Portuguese
Plasmodium
Doenças parasitárias
Genomas
Malária
Marcador molecular
Abstract in Portuguese
Casos de malária importada, contraídos em região endêmica, mas diagnosticados em um país não-endêmico, são um evento raro mas com desfecho potencialmente fatal. Nosso objetivo foi investigar se a análise de genomas mitocondriais permite inferir a origem geográfica de casos importados de malária vivax diagnosticados nos EUA, comparando os resultados com aqueles obtidos por análise de DNA microssatélite. Foi sequenciado o genoma mitocondrial completo de 63 amostras de P. vivax provenientes de infecções importadas dos EUA, além de 7 amostras do Brasil e 6 do Panamá. A rede de haplótipos com DNA mitocondrial foi construída com 412 sequências e foi possível classificar com precisão a origem geográfica presumida dos isolados da América do Sul, Coréia, Sudeste Asiático e Melanésia, porém os isolados do Sul da Ásia, América Central e África não puderam ser classificados geograficamente. A análise bayesiana realizada com a tipagem de marcadores de microssatélites não apresentou sucesso quanto à classificação geográfica dos isolados de P. vivax.
Title in English
Mitochondrial genomes of Plasmodium vivax and geographic origin of imported malaria.
Keywords in English
Plasmodium
Genomes
Malaria
Molecular marker
Parasitic diseases
Abstract in English
Cases of imported malaria, infection acquired in an endemic region, but diagnosed in a non-endemic country, are rare but can lead to a fatal outcome. Our objectives were investigate whether the analysis of mitochondrial genomes allows inferring the geographic origin of isolates of P. vivax derived from cases of imported malaria diagnosed in the USA, and compare the performance of mitochondrial genome and DNA microsatellite analysis. We sequenced full mitochondrial genomes from 63 P. vivax isolates collected at the USA from imported infections, and 7 samples from Brazil and 6 Panama. A network of mitochondrial DNA haplotypes was built with 412 genomic sequences and were able to classify accurately isolates from South America, Korea, Southeast Asia and Melanesia according to their presumed geographic origin, but failed to do so with samples from South Asia, Central America and Africa. The Bayesian analysis performed by typing microsatellite markers showed no success on the classification of geographical isolates of P. vivax.
 
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Publishing Date
2013-06-04
 
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