Phylogenetic relationships between 37 echovirus clinical isolates, most of them originating from an aseptic meningitis outbreak during 2001 in Greece, were investigated by RT-PCR and sequencing. The generic primers 292 and 222 were used to amplify about 300 bp of the 5′ end of VP1 while primers EUG3a, 3b, 3c, and EUC2 amplified the entire coding sequence of the 2A and 2B genes. Phylogenetic trees were constructed for each genomic region using the clinical isolates’ sequences and those of the prototype echoviruses in order to investigate the correlation of part of VP1 with the serotype as well as the genetic variation of the echovirus genome in 2A and 2B. The phylogenetic grouping pattern of the clinical isolates revealed that there is a correlation of serotype and genotype in the part of VP1 that was investigated, while this pattern is disrupted in the adjacent genomic regions that were sequenced. Sequence analysis of the adjacent 2A and 2B genes provided a different pattern of phylogenetic relationships and strong evidence of epidemiological linkage of most of the clinical isolates.
Archives of Virology – Springer Journals
Published: Jun 1, 2006
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