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EnglishA modified (aFT9m) and a degenerate (aFT9d) version of the rotavirus G9-specific primer (aFT9) allowed strains that were previously untypable, because of point mutations accumulating at the primer binding site, to be G typed by reverse transcription-polymerase chain reaction. The strains were collected during 2001-2002 in Italy in hospitals of the Apulia region, from children affected by severe rotavirus-associated enteritis. Using a wide selection of G9 rotaviruses detected worldwide, sequencing of the G9 untypable strains, sequence comparison, and phylogenetic analysis showed that the Italian strains have strong genetic similarity (< or =99.4%) to G9 rotaviruses identified recently in many parts of the world and different from the old G9 strains identified during the 1980s (less than 90%). Genetic variation of G9 rotaviruses explains the constraints encountered in the typing assays and presumably accounts, together with genetic reassortment events, for the emergence on a global scale of the G9 serotype.
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| Titolo: | Nucleotide variation in the VP7 gene affects PCR genotyping of G9 rotaviruses identified in Italy |
| Autori: | |
| Data di pubblicazione: | 2004 |
| Rivista: | |
| Citazione: | Nucleotide variation in the VP7 gene affects PCR genotyping of G9 rotaviruses identified in Italy / Martella, V; Terio, V; Arista, S; Elia, G; Corrente, M; Madio, A; Pratelli, A; Tempesta, M; Cirani, A; Buonavoglia, C.. - In: JOURNAL OF MEDICAL VIROLOGY. - ISSN 0146-6615. - 72:1(2004), pp. 143-148. |
| Handle: | http://hdl.handle.net/11586/132438 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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http://hdl.handle.net/11586/132438
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