Since the viral HA and NA genes of the recent outbreak of swine influenza 2009 A(H1N1) are 27.2% and 18.2% distinct respectively, in amino acid sequence, from the 2008 H1N1 strain [35], it is possible to modify this new NP-based genomic microarray using specific oligos for the 2009 influenza A (H1N1) virus or other emerging pandemic influenza strains to facilitate identification and differentiation of these viruses from other circulating influenza A viral strains. This evidence concerns the gene XK and swine influenza.