There is high genetic diversity of rotavirus strains circulating in the subcontinent. Understanding the strain diversity pre- and postvaccine introduction are important in Africa to understand the broader impact of the rotavirus vaccines on regionally circulating strains.
Our study of rotavirus strains causing severe diarrhea in rural Kenyan children showed a predominance of P[8]G1 and confirms the importance of G8 and G9 strains in sub-Saharan Africa. Considerable genetic diversity of rotavirus strains was observed, including substantial mixed and unusual types, coupled with significant temporal strain variation and emergence. These results warn of variable vaccine efficacy and the need for long-term surveillance of circulating rotavirus genotypes.
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