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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2007.tde-19102007-161502
Document
Author
Full name
Veridiana Munford
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2007
Supervisor
Committee
Racz, Maria Lucia Barbosa de Oliveira (President)
Candeias, José Alberto Neves
Cardoso, Divina das Dores de Paula
Felippe, Julia Maria Martins de Souza
Jerez, José Antonio
Title in Portuguese
Diversidade sorológica e molecular de rotavírus identificados em humanos em São Paulo, Brasil.
Keywords in Portuguese
Caracterização molecular
Diarréia
Gastroenterites virais
Genotipagem
Rotavírus
São Paulo
Abstract in Portuguese
De um total de 187 amostras fecais coletadas no ambulatório do Hospital Universitário/USP, entre 1994 a 1996, 54 (28,9%) foram positivas para rotavírus. Entre as amostras caracterizadas por EGPA foram identificados nove perfis eletroforéticos longos, dois curtos e um tipo não usual. O subgrupo II e o sorotipo G2 foram os mais freqüentemente identificados. Foram caracterizadas três amostras com misturas de sorotipos. As amostras positivas e mais 163 amostras, coletadas em um laboratório particular, em 2000, foram genotipadas. Os genótipos G2P[4] e G1P[8] foram os mais freqüentes nos anos de 1994-1996 e G1P[8] e G9P[8], os mais freqüentes em 2000. Os genótipos G3 e G4 foram detectado em menor freqüência. No HU, 20 (38,5%) amostras foram caracterizadas como misturas de genótipos G e 16 (29,6%), como misturas de genótipos P; não foram identificadas misturas em 2000. Dezoito amostras foram caracterizadas como P[10] por RT-PCR mas a análise da seqüência de nucleotídeos mostrou uma homologia de 90,7 a 98,0% com a amostra padrão P[8].
Title in English
Serological and molecular diversity of human rotavirus in São Paulo, Brazil.
Keywords in English
Diarhea
Gastroenteritis
Genotype
Molecular characterization
Rotavirus
Abstract in English
From 187 fecal samples collected from outpatients at Hospital Universitário (HU)/ USP, between 1994 to 1996, 54 (28,9%) were positive for rotavirus. Positive samples were submitted to electropherotyping, subgrouping, and G serotype. Electropherotypes were characterized as nine different long genome profiles, one short and one unusual profile. Subgroup II and G2 serotype were the most frequently found and three samples showed mixed serotypes. Rotavirus samples and an additional 163 positive fecal samples, collected in a private laboratory in 2000, were G and P genotyped. Genotypes G2P[4] and G1P[8] were the most frequently found in 1994-1996 and, in 2000, G1P[8] and G9P[8] were the most frequent. Genotype G3 and G4 were detected as minor strains in both years. For HU, G genotype mixtures were found in 20 (38.5%) samples and P mixtures were found in 16 (29.6%). No mixtures were identified in 2000. Nucleotide sequencing and phylogenetic analysis of 18 P[10] samples by RT-PCR showed 90.7 to 98.0% homology with the P[8] prototype.
 
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Publishing Date
2007-10-24
 
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