... characteriza-tion of the RHDVa subtype. A close monitoring of RHDVsubtype differentiation and strengthening of efforts to control the RHDVa pandemic should be undertaken to forestall the evolution of a new ... branch together indicating separate origins for theseoutbreaks. Furthermore, another North American isolate,Mex-89, failed to cluster with the RHDVa clade distin-guishing it from the other American ... subtyping of IA-00 strain were kindly provided by Dr. Capucci at the OIE, World Organization of Animal Health reference laboratory for caliciviruses of lagomorphs in Italy [34,35]. This work was...