Fig. 1

PCR-products generated to distinguish between low and high pathogenic avian influenza viruses of subtype H7. Primers listed in Table 2 were used for amplification. M - DNA size marker (50 bp ladder); 1 - LP H7N7 (A/mute swan/Germany/R901/2006); 2 - LP H7N9 (A/Anhui/1/2013); 3 – HP H7N1 (A/broiler/Italy/445/1999); 4 - HP H7N1 (A/chicken/Germany/AR1385/2015); 5 - LP H5N2 (A/teal-Foehr/Wv1378–79/2003) used as negative control