Abstract
Rotaviruses belong to genotype VP4-P[8] are a significant cause of severe loose diarrhea in infants and young children. In the present study, we characterised the complete genome of three of the Pakistani P[8]b RVA strains by Illumina HiSeq sequencing technology to determine the complete genotype constellation providing insight into the evolutionary dynamics of their genes using maximum likelihood analysis. The maximum genomic sequences of our study strains were similar to more recent human Wa-Like G1P[8]a, G3P[8]a, G4P[6], G4P[8], G9P[4], G9P[8]a, G11P[25],G12P[8]a and G12P[6] strains circulating around the world. Therefore, strains PAK274, PAK439 and PAK624 carry natively distinctive VP4 gene with universally common human Wa-Like genetic backbone. Comparing our study P[8]b strains with vaccines strains RotarixTM and RotaTeqTM, multiple amino acid differences were examined between vaccine virus antigenic epitopes and Pakistani isolates. Over time, these differences may result in the selection for strains that will escape the vaccine-induced RVA-neutralizing-antibody effect.
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