Network extracted from the statistical parsimony analysis performed in TCS for the Philippines isolates ( n = 112). VP1 sequences are designated with their WRLFMD number and coloured by year of collection, where the outlier (HKN/12/91) is defined with a red box. The MRCA for the Philippines O CATHAY FMDV taxon is highlighted in a red ellipse. Black dots specify non-synonymous substitutions, whereas white dots represent synonymous substitutions. The year codes in the virus isolate labels have been abbreviated to the last two digits.