P[8]b is a newly discovered sub-genotype for VP4 gene of group A human rotaviruses(HRV) worldwide.This study was to develop an effective method to identify P[8]a,P[8]b,P[4]and P[6](sub) genotypes of VP4 genes of HRV and to investigate the prevalence of P[8]b sub-genotype and its G/P combinations of HRV in outpatient and inpatient children with diarrhea in Children's Hospital affiliated to Capital Institute of Pediatrics from 2009 to 2010.By analyzing the collected nucleotide sequences of VP4 gene for all kn...