Prevalence of G2P[4] and G12P[6] rotavirus, Bangladesh.

Approximately 20,000 stool specimens from patients with diarrhea visiting 1 urban and 1 rural hospital in Bangladesh during January 2001-May 2006 were tested for group A rotavirus antigen, and 4,712 (24.0%) were positive. G and P genotyping was performed on a subset of 10% of the positive samples (n = 471).

Sequence analysis and evolution of group B rotaviruses.

Human group B rotaviruses were isolated from hospitalized patients in Bangladesh between July 2003 and December 2004. Phylogenetic analyses of the gene segments encoding the hemagglutinin (VP4), glycoprotein (VP7) and RNA-binding protein (NSP2) of group B rotaviruses showed that Bangladeshi strains were more similar to the Indian strains than to the prototype Chinese strains. Moreover, all human strains were clustered together and were distantly related to the animal strains.