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Genotyping of respiratory syncytial virus (RSV) group A in Stockholm, Sweden, using PCR and two-dimensional melting curve analysis

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Rafiefard F, Örvell C, Bondeson K. Genotyping of respiratory syncytial virus (RSV) group A in Stockholm, Sweden, using PCR and two-dimensional melting curve analysis. APMIS 2008;116:317–22.

Genotyping of respiratory syncytial (RS) virus group A, by means of a novel method based on PCR, FRET (fluorescence resonance energy transmission) detection and two-dimensional melting curve analysis, was carried out on 80 RS virus samples of group A collected in Stockholm from 1976 to 2005. The Tm values were assessed for three different genotypes (GA2, GA5 and GA7) circulating in Sweden. Two pairs of probes were used and results of subsequent data analysis were plotted in a two-dimensional system. The results obtained were compared to genotyping using conventional nucleotide sequencing and phylogenetic tree analysis. It was found that the new assay was able to correctly identify genotype in about 89% of the isolates; it identified the remaining 11% as untypeable and as candidates for conventional nucleotide sequencing. The new method constitutes a complement to nucleotide sequencing and could be useful in studies of large numbers of samples in epidemiological studies.
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Keywords: Respiratory syncytial virus; Tm; genotyping

Document Type: Research Article

Affiliations: Department of Clinical Virology, Karolinska University Hospital, Karolinska Institute, Stockholm

Publication date: 2008-04-01

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