Pathogenesis a/infection ofH5NI virus involves hyperinduction a/pro inflammatory cytokines which causes the cytokine storm. Although mu/tigenic, NSJ gene can contribute to the level a/virulence and or cytokine resistance. In this study, the NS1 gene fragment of H5Nl isolated from chicken and muscovy duck in Central Java aljd Yogyakarta, respectively. were analyzed. Phylogenetic analyses were pe…