“…Based on nucleotide sequence analysis of the G gene, SVCV isolates are further classified into four genogroups: Ia, Ib, Ic and Id (Warg et al, 2007;Zhang et al, 2009). Genogroup Ia contains isolates from Asia, the UK and the Americas; Ib and Ic contain isolates from Eastern Europe; and Id contains isolates from the UK and some other European countries (Stone et al, 2003;Hoffmann et al, 2005;Miller et al, 2007;Zhang et al, 2009;Padhi & Verghese, 2012). The genetic clustering of SVCV isolates is closely associated with geographical location, suggesting that the virus has evolved independently in different geographical regions (Stone et al, 2013).…”