Abstract
In a community based case–control study in Kolkata, India, in 2009, two human rotaviruses with uncommon genotypes G6P[14] and G11P[25] were identified, having bovine and porcine characteristics respectively. Strain N-1/2009 with G6P[14] and strain N-38/2009 with G11P[25] genotypes, were isolated from a 13months aged boy who was asymptomatic and a 10months old girl with severe diarrhea respectively. The remaining 9 gene segments of these two strains were analyzed to find the exact origin of these unusual rotaviruses, and the origin of these two strains from bovine/porcine rotaviruses was apparent. This study identifies zoonotic transmission and single and multiple reassortment events as mechanisms driving the diversity of human rotaviruses. This study indicates interspecies transmission between human and animal rotaviruses causes single or multiple reassortment and thus contribute to the genetic diversity of rotavirus.
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