Changing trends in circulating rotavirus strains in Pune, western India in 2009-2012: emergence of a rare G9P[4] rotavirus strain.

Background: A vast diversity in rotaviruses at inter- and intra-genotypic level underscores the need for monitoring of circulating rotavirus strains. The aim of this study was to update the data on rotavirus disease and strains for the period from January 2009 to December 2012 in Pune, western India which has been one of the sites of the Indian Rotavirus Strain Surveillance Network since November 2005.

Methods: Children aged <5 years admitted for acute gastroenteritis in three different hospitals from Pune city were included in the study.