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Animal: RNA Viruses |
National Institute for Virology, Private bag X4, 2131 Sandringham, South Africa1
Pediatric Infectious Disease Research Unit, University of the Witwatersrand, South Africa2
Author for correspondence: Marietjie Venter. Fax +27 11 3214212. e-mail Mariav{at}NIV.ac.za
The molecular epidemiology of respiratory syncytial virus (RSV) was studied over four consecutive seasons (1997–2000) in a single tertiary hospital in South Africa: 225 isolates were subgrouped by RT–PCR and the resulting products sequenced. Subgroup A predominated in two seasons, while A and B co-circulated approximately equally in the other seasons. The nucleotide sequences of the C-terminal of the G-protein were compared to sequences representative of previously defined RSV genotypes. South African subgroup A and subgroup B isolates clustered into four and five genotypes respectively. One new subgroup A and three new subgroup B genotypes were identified. Different genotypes co-circulated in every season. Different circulation patterns were identified for group A and B isolates. Subgroup A revealed more variability and displacement of genotypes while subgroup B remained more consistent.
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