Molecular characterization of human astroviruses isolated in Brazil, including the complete sequences of astrovirus genotypes 4 and 5
| Autor: | Eckart Schreier, Paula Andreia Silva, Divina das Dôres de Paula Cardoso |
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| Rok vydání: | 2005 |
| Předmět: |
Serotype
Genotype Sequence analysis viruses Molecular Sequence Data Sequence Homology Genetic analysis Astrovirus Open Reading Frames Virology Astroviridae Infections Humans ORFS Child Genotyping Phylogeny Genetics biology Base Sequence Reverse Transcriptase Polymerase Chain Reaction General Medicine biology.organism_classification Open reading frame Child Preschool RNA Viral Brazil Mamastrovirus |
| Zdroj: | Archives of virology. 151(7) |
| ISSN: | 0304-8608 |
| Popis: | Human astroviruses (HAstV) are recognized as an important cause of gastroenteritis in young children worldwide. This study describes the molecular characteristics of astroviruses isolated in Brazil, using RT-PCR and molecular sequencing of segments of all three viral ORFs. Genetic analysis of a 348-nucleotide segment from ORF 2 demonstrated that the Brazilian isolates belong to HAstV genotypes 1 to 5 and 8. ORF 1b sequences displayed a high degree of nucleotide identity even between different genotypes, which disfavours HAstV genotyping in this region. ORF 1a sequence analysis classified all Brazilian samples as genogroup A. The complete sequences of HAstV genotype 4 (putative serotype 4) and genotype 5 (putative serotype 5) were determined for the first time. |
| Databáze: | OpenAIRE |
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