The first identification of rare human group A rotavirus strain G3P[10] with severe infantile diarrhea in eastern India.

During an ongoing surveillance for diarrheal pathogens, an unusual human group A rotavirus strain G3P[10] (RVA/Human-wt/IND/mcs60/2011/G3P[10]) was detected in a stool sample of a 14 months old girl child with acute diarrhea in Kolkata, eastern India. The VP7 nucleotide sequence of this strain revealed a close phylogenetic relationship to the prototype G3 strain AU-1 and Australian feline strain Cat2, whereas, the VP4 gene segment was closely related to the G8P[10] rotavirus 69M from Indonesia. Analysis of 11 gene segments of this unusual G3P[10] strain demonstrates a complex evolutionary pattern, with genes possibly derived from the group A rotaviruses of human DS-1-like and AU-1-like strains of simian and caprine host species. To our knowledge, this is the first complete genotyping report of any G3P[10] rotavirus, worldwide.