Characterization of an H3N2 triple reassortant influenza virus with a mutation at the receptor binding domain (D190A) that occurred upon virus transmission from turkeys to pigs

Table 2 Cross-HI results expressed as percent antigenic relatedness (R*)

R-values were calculated based on Archetti an Horsfall formula. R = square root (r1 × r2), where r1 is the ratio of heterologous titer obtained with virus 2 to homologous titer obtained with virus 1; r2 is the ratio of the heterologous titer obtained with virus 1 to homologous titer obtained with virus 2.

ISSN: 1743-422X