Figure 1.

Phylogenetic tree calculated on the basis of ORF2 sequences of porcine circovirus 2 (PCV-2) using the Neighbor Joining algorithm of the PHYLIP package [25] with 1000 bootstrap replicates. Bootstrap values over 500 are shown as 1/10 of the value. Argentinean isolates are identified in red. Reference strains are indicated with the corresponding GenBank accession number and the country and year of report. Isolates are grouped by subgenotypes as described by Fort et al. 2007 [23] and separated by subgroups by the dashed line as described by Wiederkehr et al. 2008 [28].