Browsing by Subject "reassortment"

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  • Zeller, Mark; Heylen, Elisabeth; Damanka, Susan; Pietsch, Corinna; Donato, Celeste; Tamura, Tsutomu; Kulkarni, Ruta; Arora, Ritu; Cunliffe, Nigel; Maunula, Leena; Potgieter, Christiaan; Tamim, Sana; De Coster, Sarah; Zhirakovskaya, Elena; Bdour, Salwa; O'Shea, Helen; Kirkwood, Carl D.; Seheri, Mapaseka; Nyaga, Martin Monene; Mphahlele, Jeffrey; Chitambar, Shobha D.; Dagan, Ron; Armah, George; Tikunova, Nina; Van Ranst, Marc; Matthijnssens, Jelle (2015)
    The majority of human group A rotaviruses possess the P[8] VP4 genotype. Recently, a genetically distinct subtype of the P[8] genotype, also known as OP354-like P[8] or lineage P[8]-4, emerged in several countries. However, it is unclear for how long the OP354-like P[8] gene has been circulating in humans and how it has spread. In a global collaborative effort 98 (near-) complete OP354-like P[8] VP4 sequences were obtained and used for phylogeographic analysis to determine the viral migration patterns. During the sampling period, 1988-2012, we found that South and East Asia acted as a source from which strains with the OP354-like P[8] gene were seeded to Africa, Europe, and North America. The time to the most recent common ancestor (TMRCA) of all OP354-like P[8] genes was estimated at 1987. However, most OP354-like P[8] strains were found in three main clusters with TMRCAs estimated between 1996 and 2001. The VP7 gene segment of OP354-like P[8] strains showed evidence of frequent reassortment, even in localized epidemics, suggesting that OP354-like P[8] genes behave in a similar manner on the evolutionary level as other P[8] subtypes. The results of this study suggest that OP354-like P[8] strains have been able to disperse globally in a relatively short time period. This, in combination with a relatively large genetic distance to other P[8] subtypes, might result in a lower vaccine effectiveness, underscoring the need for a continued surveillance of OP354-like P[8] strains, especially in countries where rotavirus vaccination programs are in place.